ASYMPTOTIC BEHAVIOR FOR TWO REGULARIZATIONS OF THE CAUCHY PROBLEM FOR THE BACKWARD HEAT EQUATION

1998 ◽  
Vol 08 (01) ◽  
pp. 187-202 ◽  
Author(s):  
K. A. AMES ◽  
L. E. PAYNE
Keyword(s):  
Asymptotic Behavior ◽  
Heat Equation ◽  
Singularly Perturbed ◽  
Infinite Cylinder ◽  
Initial Condition ◽  
Damped Wave Equation ◽  
Spatial Decay ◽  
Initial Value ◽  
The Cauchy Problem ◽  
Negative Damping

One method of regularizing the initial value problem for the backward heat equation involves replacing the equation by a singularly perturbed hyperbolic equation which is equivalent to a damped wave equation with negative damping. Another regularization of this problem is obtained by perturbing the initial condition rather than the differential equation. For both of these problems, we investigate the asymptotic behavior of the solutions as the distance from the finite end of a semi-infinite cylinder tends to infinity and thus establish spatial decay results of the Saint-Venant type.

scholarly journals Asymptotic Behavior of Solutions to the Damped Nonlinear Hyperbolic Equation

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Yu-Zhu Wang
Keyword(s):  
Cauchy Problem ◽  
Asymptotic Behavior ◽  
Hyperbolic Equation ◽  
Contraction Mapping ◽  
Dimensional Space ◽  
Contraction Mapping Principle ◽  
Nonlinear Hyperbolic Equation ◽  
Asymptotic Behavior Of Solutions ◽  
Initial Value ◽  
The Cauchy Problem

We consider the Cauchy problem for the damped nonlinear hyperbolic equation inn-dimensional space. Under small condition on the initial value, the global existence and asymptotic behavior of the solution in the corresponding Sobolev spaces are obtained by the contraction mapping principle.

scholarly journals GLOBAL EXISTENCE AND ASYMPTOTIC BEHAVIOR OF SOLUTIONS FOR THE CAUCHY PROBLEM OF A DISSIPATIVE BOUSSINESQ-TYPE EQUATION

2017 ◽  
Vol 22 (4) ◽  
pp. 441-463 ◽  
Author(s):  
Amin Esfahani ◽  
Hamideh B. Mohammadi
Keyword(s):  
Cauchy Problem ◽  
Asymptotic Behavior ◽  
Contraction Mapping ◽  
Type Equation ◽  
Global Solutions ◽  
Contraction Mapping Principle ◽  
Equation Modeling ◽  
Asymptotic Behavior Of Solutions ◽  
Initial Value ◽  
The Cauchy Problem

We consider the Cauchy problem for a Boussinesq-type equation modeling bidirectional surface waves in a convecting fluid. Under small condition on the initial value, the existence and asymptotic behavior of global solutions in some time weighted spaces are established by the contraction mapping principle.

scholarly journals Global Existence and Asymptotic Behavior of Solutions to the Generalized Damped Boussinesq Equation

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yinxia Wang ◽  
Hengjun Zhao
Keyword(s):  
Cauchy Problem ◽  
Asymptotic Behavior ◽  
Global Existence ◽  
Decay Estimate ◽  
Boussinesq Equation ◽  
Asymptotic Behavior Of Solutions ◽  
Initial Value ◽  
Linear Solution ◽  
Optimal Decay ◽  
The Cauchy Problem

We investigate the Cauchy problem for the generalized damped Boussinesq equation. Under small condition on the initial value, we prove the global existence and optimal decay estimate of solutions for all space dimensionsn≥1. Moreover, whenn≥2, we show that the solution can be approximated by the linear solution as time tends to infinity.

SPATIAL DECAY FOR SOLUTIONS OF CAUCHY PROBLEMS FOR PERTURBED HEAT EQUATIONS

2001 ◽  
Vol 11 (05) ◽  
pp. 797-808 ◽  
Author(s):  
J. C. SONG
Keyword(s):  
Heat Equation ◽  
Decay Rate ◽  
Exponential Decay ◽  
Perturbation Parameter ◽  
Infinite Cylinder ◽  
Heat Equations ◽  
Cauchy Problems ◽  
Spatial Decay ◽  
Exponential Decay Rate ◽  
Decay Of Solutions

This paper investigates the decay of solutions of four different perturbations of the heat equation in a semi-infinite cylinder when it is heated at the finite end. In each case a bound for the decay of "energy" is obtained, with an explicit exponential decay rate which depends on the perturbation parameter.

scholarly journals On the sub–diffusion fractional initial value problem with time variable order

2021 ◽  
Vol 10 (1) ◽  
pp. 1301-1315
Author(s):  
Eduardo Cuesta ◽  
Mokhtar Kirane ◽  
Ahmed Alsaedi ◽  
Bashir Ahmad
Keyword(s):  
Asymptotic Behavior ◽  
Fractional Derivative ◽  
Initial Value Problem ◽  
Regularity Result ◽  
Time Variable ◽  
Variable Order ◽  
Initial Value ◽  
Integration By Parts ◽  
Integration By Parts Formula ◽  
Variable Order Fractional Derivative

Abstract We consider a fractional derivative with order varying in time. Then, we derive for it a Leibniz' inequality and an integration by parts formula. We also study an initial value problem with our time variable order fractional derivative and present a regularity result for it, and a study on the asymptotic behavior.

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