Results 11 to 20 of about 12,102 (156)

Degenerate parabolic equations appearing in atmospheric dispersion of pollutants

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
Linear and nonlinear degenerate abstract parabolic equations with variable coefficients are studied. Here the equation and boundary conditions are degenerated on all boundary and contain some parameters.
Veli Shakhmurov, Aida Sahmurova
doaj   +1 more source

Asynchronous exponential growth of semigroups of nonlinear operators

open access: yesJournal of Mathematical Analysis and Applications, 1992
The authors analyze the property of asynchronous exponential growth for the abstract nonlinear differential equation \(z'(t)= Az(t)+ F(z(t))\), \(t\geq 0\), \(z(0)= x\in X\), where \(A\) is the infinitesimal generator of a semigroup of linear operators in the Banach space \(X\) and \(F\) is a nonlinear operator in \(X\). Asynchronous exponential growth
Gyllenberg, M, Webb, G.F
openaire   +2 more sources

A Spectral Mapping Theorem and Invariant Manifolds for Nonlinear Schr\"odinger Equations [PDF]

open access: yes, 1999
A spectral mapping theorem is proved that resolves a key problem in applying invariant manifold theorems to nonlinear Schr\" odinger type equations. The theorem is applied to the operator that arises as the linearization of the equation around a standing
Gesztesy, F.   +3 more
core   +1 more source

Physiologically structured populations with diffusion and dynamic boundary conditions [PDF]

open access: yes, 2011
We consider a linear size-structured population model with diffusion in the size-space. Individuals are recruited into the population at arbitrary sizes. The model is equipped with generalized Wentzell-Robin (or dynamic) boundary conditions.
Farkas, J. Z., Hinow, P.
core   +2 more sources

Single-Mode and Dual-Mode Nongomogeneous Dissipative Structures in the Nonlocal Model of Erosion

open access: yesМоделирование и анализ информационных систем, 2015
We consider a periodic boundary-value problem for a nonlinear equation with the deviating spatial argument in the case when the deviation is small. This equation is called a spatially nonlocal erosion equation.
A. M. Kovaleva, D. A. Kulikov
doaj   +1 more source

Myopic Models of Population Dynamics on Infinite Networks [PDF]

open access: yes, 2013
Reaction-diffusion equations are treated on infinite networks using semigroup methods. To blend high fidelity local analysis with coarse remote modeling, initial data and solutions come from a uniformly closed algebra generated by functions which are ...
Carlson, Robert
core   +1 more source

On continuity of solutions for parabolic control systems and input-to-state stability [PDF]

open access: yes, 2018
We study minimal conditions under which mild solutions of linear evolutionary control systems are continuous for arbitrary bounded input functions.
Jacob, Birgit   +2 more
core   +4 more sources

Existence of Pseudo Almost Periodic Solutions to Some Classes of Partial Hyperbolic Evolution Equations [PDF]

open access: yes, 2006
The paper examines the existence of pseudo almost periodic solutions to some classes of partial hyperbolic evolution equations. Namely, sufficient conditions for the existence and uniqueness of pseudo almost periodic solutions to those classes of ...
Diagana, Toka
core   +4 more sources

Parabolic theory of the discrete p-Laplace operator [PDF]

open access: yes, 2013
We study the discrete version of the $p$-Laplacian. Based on its variational properties we discuss some features of the associated parabolic problem.
Mugnolo, Delio
core   +1 more source

Convergence and approximation of semigroups of nonlinear operators in Banach spaces

open access: yesJournal of Functional Analysis, 1972
AbstractA general convergence theorem for semigroups of nonlinear operators in a general Banach space is proved. It is then applied to obtain an approximation theorem for such semigroups. These results extend the previously known results for semigroups of linear operators in Banach space.
Brezis, H, Pazy, A
openaire   +2 more sources

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