Literatura académica sobre el tema "Semilinear Schrodinger equations"

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Artículos de revistas sobre el tema "Semilinear Schrodinger equations"

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Oliver, Marcel y Claudia Wulff. "Stability under Galerkin truncation of A-stable Runge–Kutta discretizations in time". Proceedings of the Royal Society of Edinburgh: Section A Mathematics 144, n.º 3 (16 de mayo de 2014): 603–36. http://dx.doi.org/10.1017/s0308210512002028.

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We consider semilinear evolution equations for which the linear part is normal and generates a strongly continuous semigroup, and the nonlinear part is sufficiently smooth on a scale of Hilbert spaces. We approximate their semi-flow by an implicit A-stable Runge–Kutta discretization in time and a spectral Galerkin truncation in space. We show regularity of the Galerkin-truncated semi-flow and its time discretization on open sets of initial values with bounds that are uniform in the spatial resolution and the initial value. We also prove convergence of the space-time discretization without any condition that couples the time step to the spatial resolution. We then estimate the Galerkin truncation error for the semi-flow of the evolution equation, its Runge–Kutta discretization and their respective derivatives, showing how the order of the Galerkin truncation error depends on the smoothness of the initial data. Our results apply, in particular, to the semilinear wave equation and to the nonlinear Schrodinger equation.
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Tarasov, V. O. "The integrable initial-boundary value problem on a semiline: nonlinear Schrodinger and sine-Gordon equations". Inverse Problems 7, n.º 3 (1 de junio de 1991): 435–49. http://dx.doi.org/10.1088/0266-5611/7/3/009.

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Tesis sobre el tema "Semilinear Schrodinger equations"

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Secchi, Simone. "Nonlinear Differential Equations on Non-Compact Domains". Doctoral thesis, SISSA, 2002. http://hdl.handle.net/20.500.11767/4312.

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Oliveira, Junior José Carlos de. "Equações elípticas semilineares e quasilineares com potenciais que mudam de sinal". reponame:Repositório Institucional da UnB, 2015. http://dx.doi.org/10.26512/2015.09.T.20199.

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Tese (doutorado)—Universidade de Brasília, Instituto de Ciências Exatas, 2015.
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Neste trabalho, consideramos o problema autônomo {(-∆u+V(x)u=f(u) em R^N,@u∈H^1 (R^N)\\{0},)┤ em que N≥3, a função V é não periódica, radialmente simétrica e muda de sinal e a não linearidade f é assintoticamente linear. Além disso, impomos que V possui um limite positivo no infinito e que o espectro do operador L≔-∆+V tem ínfimo negativo. Sob essas condições, baseando-se em interações entre soluções transladadas do problema no infinito associado, é possível mostrar que tal problema satisfaz a geometria do teorema de linking clássico e garantir a existência de uma solução fraca não trivial. Em seguida, estabelecemos a existência de uma solução não trivial para o problema não autônomo {(-∆u+V(x)u=f(x,u) em R^N,@u∈H^1 (R^N)\\{0},)┤ sob hipóteses similares ao problema anterior, admitindo também que f(x,u)=f(|x|,u) dentre outras condições. Aplicamos novamente o teorema de linking para garantir que tal problema possui uma solução não trivial. Por fim, provamos que o problema quasilinear {(-∆u+V(x)u-u∆(u^2)=g(x,u) em R^3,@u∈H^1 (R^3)\\{0},)┤ em que o potencial V muda de sinal, podendo ser não limitado inferiormente, e a não linearidade g(x,u), quando |x|→∞, possui um certo tipo de monotonicidade, possui uma solução não trivial. A existência de tal solução é provada por meio de uma mudança de variável que transforma o problema num problema semilinear, nos permitindo, assim, empregar o teorema do passo da montanha combinado com o lema splitting.
In this work, we consider the autonomous problem {(-∆u+V(x)u=f(u) em R^N,@u∈H^1 (R^N)\\{0},)┤ where N≥3, V is a non-periodic radially symmetric function that changes sign and the nonlinearity f is asymptotically linear. Furthermore, we impose that V has a positive limit at infinity and the spectrum of the operator L≔-∆+V has negative infimum. Under these conditions, employing interaction between translated solutions of the problem at infinity, it is possible to show that such problem satisfies the geometry of the classical linking theorem and garantee the existence of a nontrivial weak solution. After that, we establish the existence of a nontrivial weak solution for the nonautonomous problem {(-∆u+V(x)u=f(x,u) em R^N,@u∈H^1 (R^N)\\{0},)┤ under similar hyphoteses to the previous problem, assuming also that f(x,u)=f(|x|,u) among others conditions. We apply again the classical linking theorem to ensure that such problem possesses a nontrivial weak solution. Finally, we prove that the quasilinear problem {(-∆u+V(x)u-u∆(u^2)=g(x,u) em R^3,@u∈H^1 (R^3)\\{0},)┤ where the potential V changes sign and may be unbounded from below and the nonlinearity g(x,u), as|x|→∞, has a kind of monotonicity, has a nontrivial weak solution. The existence of such solution is proved by means of a change of variables that makes the problem become a semilinear problem and hence allow us apply the mountain pass theorem combined with splitting lemma.
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Libros sobre el tema "Semilinear Schrodinger equations"

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Cazenave, Thierry. Semilinear Schrodinger Equations (Courant Lecture Notes). Courant Institute of Mathemetical Sciences, 2003.

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Capítulos de libros sobre el tema "Semilinear Schrodinger equations"

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"Semilinear Fourth-Order Hyperbolic Equation: Two Types of Blow-Up Patterns". En Blow-up for Higher-Order Parabolic, Hyperbolic, Dispersion and Schrodinger Equations, 263–84. Chapman and Hall/CRC, 2014. http://dx.doi.org/10.1201/b17415-42.

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"Semilinear Fourth-Order Hyperbolic Equation: Two Types of Blow-Up Patterns". En Blow-up for Higher-Order Parabolic, Hyperbolic, Dispersion and Schrodinger Equations, 237–70. Chapman and Hall/CRC, 2014. http://dx.doi.org/10.1201/b17415-6.

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"Classification of Global Sign-Changing Solutions of Semilinear Heat Equations in the Subcritical Fujita Range: Second- and Higher-Order Diffusion". En Blow-up for Higher-Order Parabolic, Hyperbolic, Dispersion and Schrodinger Equations, 129–32. Chapman and Hall/CRC, 2014. http://dx.doi.org/10.1201/b17415-25.

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"Classification of Global Sign-Changing Solutions of Semilinear Heat Equations in the Subcritical Fujita Range: Second- and Higher-Order Diffusion". En Blow-up for Higher-Order Parabolic, Hyperbolic, Dispersion and Schrodinger Equations, 103–56. Chapman and Hall/CRC, 2014. http://dx.doi.org/10.1201/b17415-3.

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