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Unstable ground state of nonlinear Klein-Gordon equations. (English) Zbl 0617.35072
Author’s abstract. ”We prove the instability of the ground state, i.e. least energy steady-state solution of nonlinear Klein-Gordon equations with space dimension $$n\geq 3.$$”
Reviewer: M.Wodarzik

##### MSC:
 35L70 Second-order nonlinear hyperbolic equations 35B35 Stability in context of PDEs 35B40 Asymptotic behavior of solutions to PDEs 35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation
##### Keywords:
instability; ground state; nonlinear Klein-Gordon equations
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##### References:
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