Littérature scientifique sur le sujet « Semiconvex functions »
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Articles de revues sur le sujet "Semiconvex functions"
Ngai, Van Huynh, et Jean-Paul Penot. « The Semiconvex Regularization of Functions ». SIAM Journal on Optimization 33, no 3 (8 septembre 2023) : 2457–83. http://dx.doi.org/10.1137/22m1496426.
Texte intégralZhang, K. « On various semiconvex relaxations of the squared-distance function ». Proceedings of the Royal Society of Edinburgh : Section A Mathematics 129, no 6 (1999) : 1309–23. http://dx.doi.org/10.1017/s0308210500019405.
Texte intégralVáclav, Kryštof, et Zajíček Luděk. « Differences of two semiconvex functions on the real line ». Commentationes Mathematicae Universitatis Carolinae 57, no 1 (13 avril 2016) : 21–37. http://dx.doi.org/10.14712/1213-7243.2015.153.
Texte intégralNoor, Muhammad, Khalida Noor et Muhammad Awan. « Hermite-Hadamard inequalities for relative semi-convex functions and applications ». Filomat 28, no 2 (2014) : 221–30. http://dx.doi.org/10.2298/fil1402221n.
Texte intégralTabor, Jacek, et Józef Tabor. « Extensions of convex and semiconvex functions and intervally thin sets ». Journal of Mathematical Analysis and Applications 365, no 1 (mai 2010) : 43–49. http://dx.doi.org/10.1016/j.jmaa.2009.09.038.
Texte intégralColesanti, Andrea, et Paolo Salani. « Generalised solutions of Hessian equations ». Bulletin of the Australian Mathematical Society 56, no 3 (décembre 1997) : 459–66. http://dx.doi.org/10.1017/s0004972700031257.
Texte intégralSturm, Karl-Theodor. « Gradient flows for semiconvex functions on metric measure spaces – existence, uniqueness, and Lipschitz continuity ». Proceedings of the American Mathematical Society 146, no 9 (2 mai 2018) : 3985–94. http://dx.doi.org/10.1090/proc/14061.
Texte intégralChen, Ping, et Wing-Sum Cheung. « Hermite–Hadamard inequality for semiconvex functions of rate $(k_1,k_2)$ on the coordinates and optimal mass transportation ». Rocky Mountain Journal of Mathematics 50, no 6 (décembre 2020) : 2011–21. http://dx.doi.org/10.1216/rmj.2020.50.2011.
Texte intégralBraga, J. Ederson M., Alessio Figalli et Diego Moreira. « Optimal Regularity for the Convex Envelope and Semiconvex Functions Related to Supersolutions of Fully Nonlinear Elliptic Equations ». Communications in Mathematical Physics 367, no 1 (23 mars 2019) : 1–32. http://dx.doi.org/10.1007/s00220-019-03370-2.
Texte intégral« Compensated convex transforms and geometric singularity\\ extraction from semiconvex functions ». SCIENTIA SINICA Mathematica, 2016. http://dx.doi.org/10.1360/n012015-00339.
Texte intégralThèses sur le sujet "Semiconvex functions"
Jerhaoui, Othmane. « Viscosity theory of first order Hamilton Jacobi equations in some metric spaces ». Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAE016.
Texte intégralThe main subject of this thesis is the study first order Hamilton Jacobi equations posed in certain classes of metric spaces. Furthermore, the Hamiltonian of these equations can potentially present some structured discontinuities.In the first part of this thesis, we study a discontinuous first order Hamilton Jacobi Bellman equation defined on a stratification of R^N. The latter is a finite and disjoint union of smooth submanifolds of R^N called the the subdomains of R^N. On each subdomain, a continuous Hamiltonian is defined on it, However the global Hamiltonian in R^N presents discontinuities once one goes from one subdomain to the other. We give an optimal control interpretation of this problem and we use nonsmooth analysis techniques to prove that the value function is the unique viscosity solution to the discontinuous Hamilton Jacobi Bellman equation in this setting. The uniqueness of the solution is guaranteed by means of a strong comparison principle valid for any lower semicontinuous supersolution and any upper semicontinuous subsolution. As far as existence of the solution is concerned, we use the dynamic programming principle verified by the value function to prove that it is a viscosity solution of the discontinuous Hamilton Jacobi equation. Moreover, we prove some stability results in the presence of perturbations on the discontinuous Hamiltonian. Finally, by virtue of the comparison principle, we prove a general convergence result of monotone numerical schemes approximating this problem.The second part of this thesis is concerned with defining a novel notion of viscosity for first order Hamilton Jacobi equations defined in proper CAT(0) spaces. A metric space is said to be a CAT(0) space if, roughly speaking, it is a geodesic space and its geodesic triangles are "thinner" than the triangles of the Euclidean plane. They can be seen as a generalization of Hilbert spaces or Hadamard manifolds. Typical examples of CAT(0) spaces include Hilbert spaces, metric trees and networks obtained by gluing a finite number of half-spaces along their common boundary. We exploit the additional structure that these spaces enjoy to study stationary and time-dependent first order Hamilton-Jacobi equation in them. In particular, we want to recover the main features of viscosity theory: the comparison principle and Perron's method}.We define the notion of viscosity using test functions that are Lipschitz and can be represented as a difference of two semiconvex function. We show that this new notion of viscosity coincides with the classical one in R^N by studying the examples of Hamilton Jacobi Bellman and Hamilton Jacobi Isaacs' equations. Furthermore, we prove existence and uniqueness of the solution of Eikonal type equations posed in networks that can result from gluing half-spaces of different Hausdorff dimension.In the third part of this thesis, we study a Mayer optimal control problem on the space of Borel probability measures over a compact Riemannian manifold M. This is motivated by certain situations where a central planner of a deterministic controlled system has only imperfect information on the initial state of the system. The lack of information here is very specific. It is described by a Borel probability measure along which the initial state is distributed. We define the new notion of viscosity in this space in a similar manner as in the previous part by taking test functions that are Lipschitz and can be written as a difference of two semiconvex functions. With this choice of test functions, we extend the notion of viscosity to Hamilton Jacobi Bellman equations in Wasserstein spaces and we establish that the value function is the unique viscosity solution of a Hamilton Jacobi Bellman equation in the Wasserstein space over M
Mazade, Marc. « Ensembles localement prox-réguliers et inéquations variationnelles ». Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20141.
Texte intégralThe properties of locally prox-regular sets have been studied by R.A. Poliquin, R.T. Rockafellar and L. Thibault. R.A. Poliquin also introduced the concept of ``primal lower nice function. This dissertation is devoted, on one hand to the study of primal lower nice functions and locally prox-regular sets and, on the other hand, to show existence and uniqueness of solutions of differential variational inequalities involwing such sets. Concerning the first part, we introduce a quantified viewpoint of local-prox-regularity and establish a series of characterizations for set satisfying this property. In the second part, we study differential variational inequalities with locally prox-regular sets and we show the relevance of our quantified viewpoint to prove existence results of solutions
Chapitres de livres sur le sujet "Semiconvex functions"
« Semiconvex functions ». Dans Unilateral Variational Analysis in Banach Spaces, 1017–67. WORLD SCIENTIFIC, 2023. http://dx.doi.org/10.1142/9789811258176_0010.
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