scholarly journals On the existence of global solutions for a nonlinear Klein-Gordon equation

Filomat ◽  
2014 ◽  
Vol 28 (5) ◽  
pp. 1073-1079 ◽  
Author(s):  
Necat Polat ◽  
Hatice Taskesen
Keyword(s):  
Gordon Equation ◽  
Existence Of Solutions ◽  
Global Solutions ◽  
High Energy ◽  
Global Weak Solutions ◽  
Initial Displacement ◽  
Global Existence Of Solutions ◽  
The Cauchy Problem ◽  
Klein Gordon ◽  
Klein Gordon Equation

The aim of this work is to study the global existence of solutions for the Cauchy problem of a Klein-Gordon equation with high energy initial data. The proof relies on constructing a new functional, which includes both the initial displacement and the initial velocity: with sign preserving property of the new functional we show the existence of global weak solutions.

scholarly journals Global Existence and Blow-Up of Solutions for Nonlinear Klein-Gordon Equation with Damping Term and Nonnegative Potentials

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Wen-Yi Huang ◽  
Wen-Li Chen
Keyword(s):  
Global Existence ◽  
Gordon Equation ◽  
Blow Up ◽  
Global Solutions ◽  
Invariant Sets ◽  
Potential Well ◽  
Damping Term ◽  
Potential Wells ◽  
Klein Gordon ◽  
Klein Gordon Equation

This paper is concerned with the nonlinear Klein-Gordon equation with damping term and nonnegative potentials. We introduce a family of potential wells and discuss the invariant sets and vacuum isolating behavior of solutions. Using the potential well argument, we obtain a new existence theorem of global solutions and a blow-up result for solutions in finite time.

scholarly journals Revised concavity method and application to Klein-Gordon equation

Filomat ◽  
2016 ◽  
Vol 30 (3) ◽  
pp. 831-839 ◽  
Author(s):  
M. Dimova ◽  
N. Kolkovska ◽  
N. Kutev
Keyword(s):  
Differential Inequality ◽  
Gordon Equation ◽  
Blow Up ◽  
Global Solutions ◽  
Initial Energy ◽  
Necessary And Sufficient Condition ◽  
Positive Initial Energy ◽  
Klein Gordon ◽  
Necessary And Sufficient ◽  
Klein Gordon Equation

A revised version of the concavity method of Levine, based on a new ordinary differential inequality, is proposed. Necessary and sufficient condition for nonexistence of global solutions of the inequality is proved. As an application, finite time blow up of the solution to Klein-Gordon equation with arbitrary positive initial energy is obtained under very general structural conditions.

Global solutions of quasilinear wave-Klein–Gordon system in two-space dimension: Technical tools

2017 ◽  
Vol 14 (04) ◽  
pp. 591-625 ◽  
Author(s):  
Yue Ma
Keyword(s):  
Wave Equation ◽  
Vector Field ◽  
Space Dimension ◽  
Gordon Equation ◽  
Global Solutions ◽  
Field Method ◽  
Time Dimension ◽  
Klein Gordon ◽  
Vector Field Method ◽  
Klein Gordon Equation

In this paper and its successor, we make an application of the hyperboloidal foliation method in [Formula: see text] space-time dimension. After the establishment of some technical tools in this paper, we will prove further the global existence of small regular solution to a class of hyperbolic system composed by a wave equation and a Klein–Gordon equation with null couplings. Our method belongs to vector field method and, more precisely, is a combination of the normal form and the hyperboloidal foliation method.

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