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On first order impulsive semilinear functional differential inclusions

Mouffak Benchohra, Johnny Henderson, Sotiris K. Ntouyas (2003)

Archivum Mathematicum

In this paper the Leray-Schauder nonlinear alternative for multivalued maps combined with the semigroup theory is used to investigate the existence of mild solutions for first order impulsive semilinear functional differential inclusions in Banach spaces.

On formal theory of differential equations. III.

Jan Chrastina (1991)

Mathematica Bohemica

Elements of the general theory of Lie-Cartan pseudogroups (including the intransitive case) are developed within the framework of infinitely prolonged systems of partial differential equations (diffieties) which makes it independent of any particular realizations by transformations of geometric object. Three axiomatic approaches, the concepts of essential invariant, subgroup, normal subgroup and factorgroups are discussed. The existence of a very special canonical composition series based on Cauchy...

On Fractional Helmholtz Equations

Samuel, M., Thomas, Anitha (2010)

Fractional Calculus and Applied Analysis

MSC 2010: 26A33, 33E12, 33C60, 35R11In this paper we derive an analytic solution for the fractional Helmholtz equation in terms of the Mittag-Leffler function. The solutions to the fractional Poisson and the Laplace equations of the same kind are obtained, again represented by means of the Mittag-Leffler function. In all three cases the solutions are represented also in terms of Fox's H-function.

On Fredholm alternative for certain quasilinear boundary value problems

Pavel Drábek (2002)

Mathematica Bohemica

We study the Dirichlet boundary value problem for the p -Laplacian of the form - Δ p u - λ 1 | u | p - 2 u = f in Ω , u = 0 on Ω , where Ω N is a bounded domain with smooth boundary Ω , N 1 , p > 1 , f C ( Ω ¯ ) and λ 1 > 0 is the first eigenvalue of Δ p . We study the geometry of the energy functional E p ( u ) = 1 p Ω | u | p - λ 1 p Ω | u | p - Ω f u and show the difference between the case 1 < p < 2 and the case p > 2 . We also give the characterization of the right hand sides f for which the above Dirichlet problem is solvable and has multiple solutions.

On fully practical finite element approximations of degenerate Cahn-Hilliard systems

John W. Barrett, James F. Blowey, Harald Garcke (2001)

ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique

We consider a model for phase separation of a multi-component alloy with non-smooth free energy and a degenerate mobility matrix. In addition to showing well-posedness and stability bounds for our approximation, we prove convergence in one space dimension. Furthermore an iterative scheme for solving the resulting nonlinear discrete system is analysed. We discuss also how our approximation has to be modified in order to be applicable to a logarithmic free energy. Finally numerical experiments with...

On fully practical finite element approximations of degenerate Cahn-Hilliard systems

John W. Barrett, James F. Blowey, Harald Garcke (2010)

ESAIM: Mathematical Modelling and Numerical Analysis

We consider a model for phase separation of a multi-component alloy with non-smooth free energy and a degenerate mobility matrix. In addition to showing well-posedness and stability bounds for our approximation, we prove convergence in one space dimension. Furthermore an iterative scheme for solving the resulting nonlinear discrete system is analysed. We discuss also how our approximation has to be modified in order to be applicable to a logarithmic free energy. Finally numerical experiments...

Currently displaying 481 – 500 of 2162