Blow-up for semilinear damped wave equations with sub-Strauss exponent in the scattering case
Abstract
It is well-known that the critical exponent for semilinear damped wave equations is Fujita exponent when the damping is effective. Lai, Takamura and Wakasa in 2017 have obtained a blow-up result not only for super-Fujita exponent but also for the one closely related to Strauss exponent when the damping is scaling invariant and its constant is relatively small,which has been recently extended by Ikeda and Sobajima. Introducing a multiplier for the time-derivative of the spatial integral of unknown functions, we succeed in employing the technics on the analysis for semilinear wave equations and proving a blow-up result for semilinear damped wave equations with sub-Strauss exponent when the damping is in the scattering range.
Keywords
Cite
@article{arxiv.1707.09583,
title = {Blow-up for semilinear damped wave equations with sub-Strauss exponent in the scattering case},
author = {Ning-An Lai and Hiroyuki Takamura},
journal= {arXiv preprint arXiv:1707.09583},
year = {2018}
}
Comments
The first version had the critical case, but there was a gap in the proof. That part was removed. The improvements of the estimates of the lifespan in low dimensions are added as in Theorem2.2 and Theorem 2.3 to the second version