Relevant bibliographies by topics / Existence-nonexistence

Academic literature on the topic 'Existence-nonexistence'

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Published: 11 March 2023

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Journal articles on the topic "Existence-nonexistence"

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Einheuser, Iris. "Nonexistence, Vague Existence, Merely Possible Existence." Disputatio 4, no. 33 (November 1, 2012): 427–43. http://dx.doi.org/10.2478/disp-2012-0009.

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Abstract This paper explores a new non-deflationary approach to the puzzle of nonexistence and its cousins. On this approach, we can, under a plausible assumption, express true de re propositions about certain objects that don’t exist, exist indeterminately or exist merely possibly. The defense involves two steps: First, to argue that if we can actually designate what individuates a nonexistent target object with respect to possible worlds in which that object does exist, then we can express a de re proposition about “it”. Second, to adapt the concept of outer truth with respect to a possible world – a concept familiar from actualist modal semantics – for use in representing the actual world.
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Adámek, J. "Existence and Nonexistence of Regular Generators." Canadian Mathematical Bulletin 37, no. 1 (March 1, 1994): 3–7. http://dx.doi.org/10.4153/cmb-1994-001-9.

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Moss, Lawrence. "Existence and nonexistence of universal graphs." Fundamenta Mathematicae 133, no. 1 (1989): 25–37. http://dx.doi.org/10.4064/fm-133-1-25-37.

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Bernal-González, L., and K. G. Grosse-Erdmann. "Existence and nonexistence of hypercyclic semigroups." Proceedings of the American Mathematical Society 135, no. 3 (August 31, 2006): 755–66. http://dx.doi.org/10.1090/s0002-9939-06-08524-8.

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Tabachnikov, Serge. "Existence and nonexistence of skew branes." Journal of Fixed Point Theory and Applications 7, no. 2 (July 23, 2010): 419–31. http://dx.doi.org/10.1007/s11784-010-0015-y.

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Durhuus, Bergfinnur, Thordur Jonsson, and Ryszard Nest. "Noncommutative scalar solitons: existence and nonexistence." Physics Letters B 500, no. 3-4 (February 2001): 320–25. http://dx.doi.org/10.1016/s0370-2693(01)00086-7.

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Freydenberger, Dominik D., and Daniel Reidenbach. "Existence and nonexistence of descriptive patterns." Theoretical Computer Science 411, no. 34-36 (July 2010): 3274–86. http://dx.doi.org/10.1016/j.tcs.2010.05.033.

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Ma, Zhaohai, and Rong Yuan. "Traveling wave solutions of a nonlocal dispersal SIRS model with spatio-temporal delay." International Journal of Biomathematics 10, no. 05 (May 9, 2017): 1750071. http://dx.doi.org/10.1142/s1793524517500711.

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This paper is mainly concerned with the existence and nonexistence of traveling wave solutions of a nonlocal dispersal SIRS model with nonlocal delayed transmissions. We find that the existence and nonexistence of traveling wave solutions are determined by the critical wave speed [Formula: see text]. More specifically, we establish the existence of traveling wave solutions for every wave speed [Formula: see text] and [Formula: see text] by means of upper-lower solutions and Schauder’s fixed point theorem. Nonexistence of traveling wave solutions is obtained by Laplace transform for any wave speed [Formula: see text] and [Formula: see text].
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Wang, Shin-Hwa, and Nicholas D. Kazarinoff. "On positive solutions of some semilinear elliptic equations." Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics 50, no. 3 (June 1991): 343–55. http://dx.doi.org/10.1017/s144678870003295x.

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AbstractThe existence of positive solutions of some semilinear elliptic equations of the form −Δu = λf(u) is studied. The major results are a nonexistence theorem which gives a λ* = λ*(f,Ω) > 0 below which no positive solutions exist and a lower bound theorem for umax for Ω a ball. As a corollary of the nonexistence theorem that describes the dependence of the number of solutions on λ, two other nonexistence theorems, and an existence theorem are also proved.
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Jleli, Mohaemd, and Bessem Samet. "On Local Weak Solutions for Fractional in Time SOBOLEV-Type Inequalities." Journal of Function Spaces 2020 (September 23, 2020): 1–7. http://dx.doi.org/10.1155/2020/4867186.

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We consider two fractional in time nonlinear Sobolev-type inequalities involving potential terms, where the fractional derivatives are defined in the sense of Caputo. For both problems, we study the existence and nonexistence of nontrivial local weak solutions. Namely, we show that there exists a critical exponent according to which we have existence or nonexistence.
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Dissertations / Theses on the topic "Existence-nonexistence"

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Morton, Jeffrey. "Existence and nonexistence theorems for solutions to the Einstein-Dirac-Maxwell equations." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30825.

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This thesis deals with representative examples from a recent body of work dealing with coupling of Einsteinian gravity to quantum-mechanical matter fields, and in particular the Dirac field and the electromagnetic field. The first part of the thesis develops the proof of the existence of particle-like (soliton) solutions to the fully coupled Einstein-Dirac equation, from the derivation of the form of the equations and their numerical solution to a numerical and topological analysis of the stability of the solutions found. In the second half of the thesis, two nonexistence theorems are developed for black-hole solutions for the Einstein-Dirac-Maxwell system with various coupling-strengths and symmetry conditions. These nonexistence theorems show the impossibility of stable, nontrivial, Dirac fields in the presence of black holes in the cases investigated.
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Rivetti, Sabrina. "Bounded variation solutions of capillarity-type equations." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/10161.

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2012/2013
We investigate by different techniques, the solvability of a class of capillarity-type problems, in a bounded N-dimensional domain. Since our approach is variational, the natural context where this problem has to be settled is the space of bounded variation functions. Solutions of our equation are defined as subcritical points of the associated action functional.
We first introduce a lower and upper solution method in the space of bounded variation functions. We prove the existence of solutions in the case where the lower solution is smaller than the upper solution. A solution, bracketed by the given lower and upper solutions, is obtained as a local minimizer of the associated functional without any assumption on the boundedness of the right-hand side of the equation. In this context we also prove order stability results for the minimum and the maximum solution lying between the given lower and upper solutions. Next we develop an asymmetric version of the Poincaré inequality in the space of bounded variation functions. Several properties of the curve C are then derived and basically relying on these results, we discuss the solvability of the capillarity-type problem, assuming a suitable control on the interaction of the supremum and the infimum of the function at the right-hand side with the curve C. Non-existence and multiplicity results are investigated as well. The one-dimensional case, which sometimes presents a different behaviour, is also discussed. In particular, we provide an existence result which recovers the case of non-ordered lower and upper solutions.
XXV Ciclo
1985
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Dannawi, Ihab. "Contributions aux équations d'évolutions non locales en espace-temps." Thesis, La Rochelle, 2015. http://www.theses.fr/2015LAROS007/document.

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Dans cette thèse, nous nous intéressons à l'étude de quatre équations d'évolution non-locales. Les solutions de ces quatre équations peuvent exploser en temps fini. Dans la théorie des équations d'évolution non-linéaires, une solution est qualifiée de globale si elle est définie pour tout temps positif. Au contraire, si une solution existe seulement sur un intervalle de temps [0; T) borné, elle est dite locale. Dans ce dernier cas et quand le temps maximal d'existence est relié à une alternative d'explosion, on dit aussi que la solution explose en temps fini. Dans un premier travail, nous considérons l'équation de Schrödinger non-linéaire avec une puissance fractionnaire du laplacien, et nous obtenons l'explosion de la solution en temps fini Tmax > 0 pour toute condition initiale positive et non-triviale dans le cas d'exposant sous-critique. Ensuite, nous étudions une équation des ondes amorties avec un potentiel d'espace-temps et un terme non-linéaire et non-local en temps. Nous obtenons un résultat d'existence locale d'une solution dans l'espace d'énergie sous des conditions restrictives sur les données initiales, la dimension de l'espace et la croissance du terme non-linéaire. De plus, nous obtenons l'explosion de la solution en temps fini pour toute condition initiale de moyenne strictement positive. De plus, nous étudions un problème de Cauchy pour l'équation d'évolution avec un p- Laplacien avec une non linéarité non-locale en temps. Dans ce cadre, nous nous intéressons à l'étude de l'existence locale d'une solution de cette équation ainsi qu'un résultat de non-existence de solution globale. Finalement, nous étudions l'intervalle maximal d'existence des solutions de l'équation des milieux poreux avec un terme non-linéaire non-local en temps
In this thesis, we study four non-local evolution equations. The solutions of these four equations can blow up in finite time. In the theory of nonlinear evolution equations, a solution is qualified as global if it isdefined for any time. Otherwise, if a solution exists only on a bounded interval [0; T), it is called local solution. In this case and when the maximum time of existence is related to a blow up alternative, we say that the solution blows up in finite time. First, we consider the nonlinear Schröodinger equation with a fractional power of the Laplacien operator, and we get a blow up result in finite time Tmax > 0 for any non-trivial non-negative initial condition in the case of sub-critical exponent. Next, we study a damped wave equation with a space-time potential and a non-local in time non-linear term. We obtain a result of local existence of a solution in the energy space under some restrictions on the initial data, the dimension of the space and the growth of nonlinear term. Additionally, we get a blow up result of the solution in finite time for any initial condition positive on average. In addition, we study a Cauchy problem for the evolution p-Laplacien equation with nonlinear memory. We study the local existence of a solution of this equation as well as a result of non-existence of global solution. Finally, we study the maximum interval of existence of solutions of the porous medium equation with a nonlinear non-local in time term
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"On the existence and nonexistence of capillary surfaces." 1998. http://library.cuhk.edu.hk/record=b5889539.

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by Ho Wing Kin.
Thesis submitted in: July 1997.
Thesis (M.Phil.)--Chinese University of Hong Kong, 1998.
Includes bibliographical references (leaves 89-92).
Chapter 1 --- Introduction --- p.5
Chapter 1.1 --- The Euler-Lagrange Equation for Capillary Surfaces --- p.6
Chapter 1.2 --- The Capillary Tube --- p.12
Chapter 2 --- Comparison Principles --- p.16
Chapter 2.1 --- The General Comparison Principle --- p.16
Chapter 2.2 --- Applications --- p.24
Chapter 3 --- Existence Criteria --- p.30
Chapter 3.1 --- Necessary Conditions --- p.31
Chapter 3.2 --- Sufficient Conditions --- p.35
Chapter 4 --- Uniqueness --- p.53
Chapter 4.1 --- General Bounded Domains Case --- p.53
Chapter 4.2 --- Infinite Strip Case --- p.56
Chapter 5 --- Gradient Estimate of Surfaces of Constant Mean Curvature --- p.66
Chapter 5.1 --- The Gradient Estimate --- p.67
Chapter 5.2 --- Behavior as R→ 1 --- p.70
Chapter 5.3 --- Existence of the Comparison Surfaces --- p.76
Chapter 5.4 --- Ro is Best Possible --- p.82
Appendix Mean Curvature --- p.85
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Chen, Zhi-You, and 陳志有. "The existence and nonexistence of the positive entire solutions in Biharmonic equation." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/13314819632480061944.

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LIAO, HSI-WEI, and 廖希文. "Legitimacy of confirm the existence or nonexistence of the parent-child relationship─Focus on the categorization and the application of legal principle." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4f2b3d.

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碩士
東吳大學
法律學系
105
Firstly, this article uses parent-child relationship in substantive law as a starting point to procedural law of litigation category, introducing confirm the existence or nonexistence of the parent-child relationship, claim legislative disavowal of legitimacy, claim acknowledgement of a child by the natural father, claim acknowledgement of no avail, revoked claim acknowledgement, claim the determination of the biological father of a child born after the remarriage of the mother, through observation of legal history, and reason for amendments by Civil Code, Code of Civil Procedure and Family Law by Case on the statute in order to the overall evolution of the understanding. Secondly, this article focus on discussing of the categorization and the application of legal principle. About the categorization section, this article categorizates by subject to appeal, to extended of discussing ability party and proper party on question. Other on the application of legal principle section, this article discusses litigation legal principle and non-litigation legal principle, and then discusses on individuality legal principle of confirm the existence or nonexistence of the parent-child relationship on most questions, for example how amending by inquisitorial to doctrine of disposition and verhandlungsmaxime. Confirm the existence or nonexistence of the parent-child relationship must be applicable to limit doctrine of disposition, limit verhandlungsmaxime, words inquisition, private doctrine, direct inquisition, timely proposed doctrine, focus hearing doctrine, free proof doctrine. Finally, because Family Law is amended, confirm the existence or nonexistence of the parent-child relationship of amalgamation of actions is changed. This article under current law discusses amalgamation of actions confirm the existence or nonexistence of the parent-child relationship from Family Law by Case Act 41 as a starting point. Through current law of related questions, This article uses German law to compare with our country, and legislates on reasonable theory and interpretation, as suggested in this article conclusions and future repair methods. Key Words：confirm the existence or nonexistence of the parent-child relationship, claim legislative disavowal of legitimacy, categorization, application of legal principle
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BORDONI, SARA. "Nonlinear elliptic problems in the Heisenberg group." Doctoral thesis, 2018. http://hdl.handle.net/2158/1121183.

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The aim of this Ph.D. thesis is to present new results concerning the study of nonlinear elliptic problems in the context of the Heisenberg group. We deal with different problems, but the common thread consists in extending to a more general setting, the Heisenberg group, results proved in the Euclidean case. This generalization process in the Heisenberg framework implies a series of technical difficulties, that force the use of new key theorems.
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Klishchuk, Bogdan. "Essays on Information and Markets." Phd thesis, 2017. http://hdl.handle.net/1885/133568.

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This thesis provides new equilibrium existence results for markets with information asymmetries and relates them in a novel way to the role of economic intermediation. Under atomless uncertainty, single market linear price equilibria are known not to exist prevalently even when agents are risk averse expected utility maximizers. The notion of prevalence involves essentially picking an economy at random. Bypassing the nonexistence problem is one of the achievements of the nonlinear price decentralization theory. This thesis contributes by reconciling the nonlinear price decentralization theory to a large extent with certain competitive market structures. We do this in Chapter 1 by defining linear price equilibrium with multiple markets and establishing its existence. Each market has its own price vector (linear functional), and agents’ involvement in various markets is heterogeneous. As a result, price differences across markets may prevail in equilibrium. We present an example in which single market linear price equilibrium does not exist but certain corresponding equilibrium with two markets does. Our equilibrium with multiple markets has a more standard economic interpretation than equilibrium with nonlinear prices used in nonlinear decentralization theory. Our framework can potentially accommodate even more nonlinearities if economic intermediaries are explicitly introduced into the model. Despite the nonexistence problem, single market linear price equilibrium with infinitely many states is still known to exist under restrictive assumptions on the information structure. In Chapter 2, we introduce two new results on the existence of single market linear price (Radner) equilibrium with infinitely many states under economically meaningful conditions. Our first result requires that agents have independent information, while the second assumes that the total endowment of the economy is common knowledge. In Chapter 3, we explore how economic agents can test the scope of their knowledge and, in particular, the informational content of equilibrium prices under asymmetric information. We show that one can go far in arguing that equilibrium prices tend to be fully revealing.
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Dhara, Raj Narayan. "Existence and regularity theory in weighted Sobolev spaces and applications." Doctoral thesis, 2016. https://depotuw.ceon.pl/handle/item/2051.

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In the thesis we discuss several questions related to the study of degenerate, possibly nonlinear PDEs of elliptic type. At first we discuss the equivalent conditions between the validity of weighted Poincar\'e inequalities, structure of the functionals on weighted Sobolev spaces, isoperimetric inequalities and the existence and uniqueness of solutions to the degenerate nonlinear elliptic PDEs with nonhomogeneous boundary condition, having the form:\begin{eqnarray}\label{eqn:abs}\left\{\begin{array}{lll}{\rm div} \left( \rho (x)|\nabla u|^{p-2}\nabla u\right) =x^*,\\~~~~~~~~~~~~u-w \in W^{1,p}_{\rho,0} (\Omega),\end{array}\right.\end{eqnarray}involving any given $x^*\in (W^{1,p}_{\rho,0} (\Omega))^*$ and $w\in W^{1,p}_{\rho} (\Omega)$, where $u\in W^{1,p}_{\rho} (\Omega)$ and $W^{1,p}_{\rho} (\Omega)$ denotes certain weighted Sobolev space, $W^{1,p}_{\rho,0} (\Omega)$ is the completion of $\mathcal{C}_{0}^{\infty}(\Omega)$. As a next step, we undertake a natural question how to interpret the nonhomogenous boundary conditions in weighted Sobolev spaces, when the natural analytical tools, like trace embedding theorems, are missing. Our further goal is to contribute to solvability and uniqueness for degenerate elliptic PDEs with nonhomogenous boundary condition being the extension of~\eqref{eqn:abs}. In addition to the monotonicity method used in the first step of our discussion for the problem~\eqref{eqn:abs}, we also exploit Lax-Miligram theorem to treat the linear problem like:\begin{equation*}\begin{cases}-{\rm div} (A(x)\nabla u(x)) + B(x)\cdot\nabla u(x) + C(x)u(x) = x^{*}\ \ \text{for a.e.}\ x\in \Omega, \\~~~~~~~~~~~~~~~~~~ u(x) = g(x) \ \ \text{for a.e. }\ x\in \partial\Omega ,\end{cases}\end{equation*}as well as Ekeland's Variational Principle and Boccardo-Murat techniques to consider problem like:\begin{align*} \begin{cases} - {\rm div} \left( \rho (x)|\nabla u|^{p-2}\nabla u\right) - \lambda\, b(x)| u|^{p-2} u = x^*,\\~~~~~~~~~~~~~~~~~~~u-z \in X , \end{cases}\end{align*}where $p>1,\ \lambda>0$, and the operator $\mathcal{L}_{\lambda} u:= - {\rm div} \left( \rho (x)|\nabla u|^{p-2}\nabla u\right) - \lambda\, b(x)| u|^{p-2} u $ is non-monotone.For the study of the nonhomogeneous BVPs, we apply recent results due to Ka\l{}amajska and myself, where we constructed trace extension operator from weighted Orlicz-Slobodetskii spaces defined on the boundary of the domain to weighted Orlicz-Sobolev spaces in the domain. Information on the spectrum of the corresponding differential operator is also derived. Moreover, some nonexistence and nonuniqueness results are also analyzed.
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Books on the topic "Existence-nonexistence"

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Paad, Mona. Mona Paad: Existence & nonexistence. Tehran, Iran: Etemad Gallery, 2013.

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Jacquette, Dale. Meinongian logic: The semantics of existence and nonexistence. Berlin: W. de Gruyter, 1996.

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Jacquette, Dale. Meinongian Logic: The Semantics of Existence and Nonexistence. de Gruyter GmbH, Walter, 2011.

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Davidson, Matthew. Metaphysics of Existence and Nonexistence: Actualism, Meinongianism, and Predication. Bloomsbury Publishing Plc, 2023.

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Yourgrau, Palle. Death and Nonexistence. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190247478.001.0001.

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The dead are gone. They count for nothing. Yet if we count the dead, their number is staggering. And they account for most of what’s great about civilization. Compared to the greatness of the dead, the accomplishments of the living are paltry. Which is it then: are the dead still there to be counted or not? And if they’re still there, where, exactly, is “there”? We’re confronted with the ancient paradox of nonexistence bequeathed us by Parmenides. The mystery of death is the mystery of nonexistence. A successful attempt to provide a metaphysics of death, then, must at the same time resolve the paradox of nonexistence. That is the aim of this study. At the same time, the ontology of death, i.e. of ceasing to exist, must serve as an account of birth, i.e. coming to exist, and the primary thesis of this book is that this requires expanding one’s ontology beyond existence and nonexistence to include what underlies both, namely, “being.” The dead, along with the unborn, are nonexistent objects which retain their identity before, during, and after their transition to, and from, existence. The nonexistent are what are “there” that can be counted when we count the dead. The dead and the unborn are thus the same kind of beings as the living. What separates the living from the dead is only their existence.
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Meinongian Logic: The Semantics of Existence and Nonexistence (Perspectives in Analytical Philosophy, Bd 11). Walter de Gruyter, 1997.

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Segev, Mor. The Value of the World and of Oneself. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780197634073.001.0001.

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This book examines the long-standing debate between philosophical optimism and pessimism in the history of philosophy, focusing on Aristotle, Maimonides, Spinoza, Schopenhauer, Nietzsche, and Camus. Philosophical optimists maintain that the world is optimally arranged and is accordingly valuable, and that the existence of human beings is preferable over their nonexistence. Philosophical pessimists, by contrast, hold that the world is in a woeful condition and ultimately valueless, and that human nonexistence would have been preferable over human existence. Schopenhauer criticizes the optimism he locates in the Hebrew Bible and in Spinoza for being unable to square the presumed perfection of the world and its parts, including human life, with the suffering and misfortunes observable in them, and for leading to egoism and thereby to cruelty. Nietzsche, in turn, criticizes Schopenhauer’s overtly pessimistic view, inter alia, for furtively positing a perfect state for one to aspire to, thus being latently optimistic. Similarly, Camus charges Nietzsche, who announces his rejection of both optimism and pessimism, with deifying the world and oneself, thereby reverting to optimism. Interestingly, Aristotle countenances an optimistic theory, later adopted and developed by Maimonides, that is arguably capable of facing Schopenhauer’s challenge. Aristotelian optimism accounts for the perfection of the world in terms of a hierarchy of value between its parts, with human beings ranked relatively low, and recommends an attitude congruent with that ranking.
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Goldman, Alvin I., and Brian P. McLaughlin, eds. Metaphysics and Cognitive Science. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190639679.001.0001.

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It is generally agreed that physical science can shed light on many issues in metaphysics. But it is not widely recognized that cognitive science can do this as well. It is trivial, of course, that cognitive science can illuminate the nature of mind. But here it is argued that cognitive science can even illuminate the existence or nonexistence of nonmental entities and their properties. Exactly how cognitive science can address these metaphysical issues is a central question tackled in this book. Among the specific topics approached from this perspective are time, morality, meaning, theism, bodily feelings, sortals, and much, much else.
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Griffel, Frank. Ismāʿīlite Critique of Ibn Sīnā. Edited by Khaled El-Rouayheb and Sabine Schmidtke. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780199917389.013.34.

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Al-Shahrastānī’s (d. 548/1153) Wrestling Match with the Falāsifa (Muṣāraʿat al-falāsifa) is the second book of refutation of Ibn Sīnā’s (Avicenna, d. 428/1037) philosophy by a Muslim philosopher and theologian. While al-Ghazālī tried to prove the nondemonstrative character of Ibn Sīnā’s teachings, al-Shahrastānī “wrestles” with Ibn Sīnā about what is true to say about God. Heavily influenced by the cosmology of the Ismāʿīlite Shīʿites of his day, al-Shahrastānī claims that God is too transcendent to be included in divisions of what is existent. God is beyond the dichotomy of existence and nonexistence. Equally God is not “simplicity” (wāḥda) the way Ibn Sīnā claims. Rather, words like “existence” and “simplicity” apply to God only in an equivocal way rather than univocal or, as Ibn Sīnā claims, moderated. Most mistakes in philosophical theology are committed, so al-Shahrastānī, because equivocal terms are wrongfully understood to be univocal.
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Hollingworth, Miles. Ludwig Wittgenstein. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190873998.001.0001.

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This reflexive book on Ludwig Wittgenstein’s life and thought challenges the meaning and form of biography and subject as much as it launches radical new treatments of Wittgenstein’s sexuality and religious thinking. From first to last, Wittgenstein’s philosophy sought to demonstrate that certainty is a function of the method it employs, rather than a knowledge of the existence or nonexistence of its objects. A devastating insight that appears to make the natural and the supernatural into equally useless examples of each other. This biography proceeds in the same way. Scattered in every direction by this challenge to meaning, it attempts to retrieve itself around the spirit of the man who could say such things. This act of recovery thus performs what could not otherwise be explained; which is something like Wittgenstein’s private conversation with God. This conversation is then allowed to talk back to the story that might have been told, to remonstrate with its facts, and finally, to show them to have been all along what Wittgenstein meant by ‘the despotic moment’, or ‘the hardness of the logical must’.
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Book chapters on the topic "Existence-nonexistence"

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Xin, Yuanlong. "Existence, Nonexistence and Regularity." In Geometry of Harmonic Maps, 121–46. Boston, MA: Birkhäuser Boston, 1996. http://dx.doi.org/10.1007/978-1-4612-4084-6_5.

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Freydenberger, Dominik D., and Daniel Reidenbach. "Existence and Nonexistence of Descriptive Patterns." In Developments in Language Theory, 228–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02737-6_18.

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Kružík, Martin, and Tomáš Roubíček. "General Hyperelastic Materials: Existence/Nonexistence Results." In Interaction of Mechanics and Mathematics, 87–159. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02065-1_4.

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Laag, Patrick R. J., and Shan-Hwei Nienhuys-Cheng. "Existence and nonexistence of complete refinement operators." In Machine Learning: ECML-94, 307–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-57868-4_66.

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Minhós, Feliz Manuel. "Existence, Nonexistence and Multiplicity Results for Some Beam Equations." In Progress in Nonlinear Differential Equations and Their Applications, 257–67. Basel: Birkhäuser Basel, 2007. http://dx.doi.org/10.1007/978-3-7643-8482-1_21.

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Lehrer, Raquel, and Liliane A. Maia. "Existence and Nonexistence Results for a Schrödinger Equation with Saturable Nonlinearity." In Analysis and Topology in Nonlinear Differential Equations, 309–21. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04214-5_19.

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Birchal, Telma S., and Sérgio D. J. Pena. "The Biological Nonexistence versus the Social Existence of Human Races: Can Science Instruct the Social Ethos?" In Racial Identities, Genetic Ancestry, and Health in South America, 69–99. New York: Palgrave Macmillan US, 2011. http://dx.doi.org/10.1057/9781137001702_4.

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Notaris, Sotirios E. "An Overview of Results on the Existence or Nonexistence and the Error Term of Gauss-Kronrod Quadrature Formulae." In Approximation and Computation: A Festschrift in Honor of Walter Gautschi, 485–96. Boston, MA: Birkhäuser Boston, 1994. http://dx.doi.org/10.1007/978-1-4684-7415-2_32.

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Krutitskii, P. A., and N. Ch Krutitskaya. "Existence of a Classical Solution and Nonexistence of a Weak Solution to the Dirichlet Problem for the Laplace Equation in a Plane Domain with Cracks." In Integral Methods in Science and Engineering, Volume 1, 183–92. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4899-2_19.

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Calverley, Edwin E., and James W. Pollock. "Existence and Nonexistence." In Nature, Man and God in Medieval Islam, 180–228. BRILL, 2002. http://dx.doi.org/10.1163/9789004531468_012.

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Conference papers on the topic "Existence-nonexistence"

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Yanping Wang and Junhui Zhu. "The existence and nonexistence of global solutions for a nonlinear hyperbolic equation." In 2011 International Conference on Multimedia Technology (ICMT). IEEE, 2011. http://dx.doi.org/10.1109/icmt.2011.6002406.

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Naceri, Mostepha, and Amir Elhaffaf. "Existence and nonexistence of positive solutions for singular fifth-order three-point BVP." In THE 4TH INTERNATIONAL CONFERENCE ON MATHEMATICAL SCIENCES: Mathematical Sciences: Championing the Way in a Problem Based and Data Driven Society. Author(s), 2017. http://dx.doi.org/10.1063/1.4980951.

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Graef, John, and Bo Yang. "Existence and nonexistence of positive solutions of a nonlinear third order boundary value problem." In The 8'th Colloquium on the Qualitative Theory of Differential Equations. Szeged: Bolyai Institute, SZTE, 2007. http://dx.doi.org/10.14232/ejqtde.2007.7.9.

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Rakhmonov, Zafar, Roman Parovik, and Akram Alimov. "Global existence and nonexistence for a multidimensional system of parabolic equations with nonlinear boundary conditions." In INTERNATIONAL UZBEKISTAN-MALAYSIA CONFERENCE ON “COMPUTATIONAL MODELS AND TECHNOLOGIES (CMT2020)”: CMT2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0057139.

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Mishatkina, T. V. "EXTREME ETHICS IN EXTREME SITUATIONS." In SAKHAROV READINGS 2021: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute, 2021. http://dx.doi.org/10.46646/sakh-2021-1-68-71.

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The problems of the ethical paradigm changing in the extreme conditions of human existence (global climate change and the coronavirus pandemic) are considered. The question of the revision for the category “nonexistence” status is raised; the necessity to move from an activity-aggressive approach in relation to nature to adaptive approach including the attitude to environmental and other disasters (including epidemics and pandemics) as objective forms of self-regulation resulted via the balance of population and natural resources are under discussion.
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Kawase, Yasushi, and Atsushi Iwasaki. "Near-Feasible Stable Matchings with Budget Constraints." In Twenty-Sixth International Joint Conference on Artificial Intelligence. California: International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/35.

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This paper deals with two-sided matching with budget constraints where one side (firm or hospital) can make monetary transfers (offer wages) to the other (worker or doctor). In a standard model, while multiple doctors can be matched to a single hospital, a hospital has a maximum quota: the number of doctors assigned to a hospital cannot exceed a certain limit. In our model, a hospital instead has a fixed budget: the total amount of wages allocated by each hospital to doctors is constrained. With budget constraints, stable matchings may fail to exist and checking the existence is hard. To deal with the nonexistence of stable matchings, we extend the “matching with contracts” model by Hatfield and Milgrom, so that it handles near-feasible matchings that exceeds each budget of the hospitals by a certain amount. We then propose two novel mechanisms that efficiently return such a near-feasible matching that is stable with respect to the actual amount of wages allocated by each hospital. In particular, by sacrificing strategy-proofness, our second mechanism achieves the best possible bound.
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Kim, Jungsub, Heebum Chun, and ChaBum Lee. "CFRP Milling and Drilling Process Monitoring by Using a Spindle-Integrated Three Axis Force Sensor." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-85799.

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Abstract This paper introduces a spindle-integrated 3-axis force sensor consisted of 2-axis curved-edge sensor (CES) for the radial direction and single axis capacitive sensor (CS) for the axial direction. The proposed single unit force sensor was used to monitor the carbon fiber-reinforced plastic (CFRP) milling and drilling processes and to understand their machining mechanics. Unlike a conventional cutting force sensor can non-contact measure the displacement of the spindle and estimate the cutting force by multiplying the spindle stiffness and the measured displacement. The force sensor unit was successfully integrated with the spindle and measured the cutting force while machining the CFRP plates with 0°, 45° and 90° fiber orientation. The conventional 3-axis force sensor was also used for a baseline comparison with the cutting force results measured by the proposed method. To monitor and characterize the delamination effect of CFRP, the time-frequency domain scalogram images analyzed form the cutting force data were used. Unique features were extracted according to the fact of existence and nonexistence of the delamination. Laser, the sensor measured capability, allowing for in-process CFRP machining process monitoring and CFRP defect mode prediction was discussed.
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Watanuki, Keiichi, Kenta Hirayama, and Kazunori Kaede. "Brain Activation Analysis of Voluntary Movement and Passive Movement Using Near-Infrared Spectroscopy." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71273.

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During neural activity in the brain, humans transmit and process information and decide upon actions or responses. When neural activity occurs, blood flow and blood quantity increase in the tissue near the active neurons, and the ratio of oxygenated to deoxygenated hemoglobin in the blood changes. In this paper, we used near-infrared spectroscopy (NIRS) to determine the state of hemoglobin oxygenation at the cerebral surface and on that basis performed real-time color mapping of brain activity (the brain activation response) in the target regions. In this paper, we describe measurements of brain activation using NIRS so as to clarify any differences between conscious and unconscious movement. Bio-locomotion is divided into voluntary movements, which are made voluntarily and consciously, and passive movements, which are made passively and unconsciously. Accordingly, in this paper we investigate the brain activation associated with these two types of movements. The subject successively moves his/her lower legs through knee bends. We measure the brain activities while the subject, who is sitting on a chair moves back and forth. In addition, we carry out an experiment on the effects of the existence or nonexistence of movement caused by vibration on brain activities to consider the results.
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