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arXiv 2006.05006math.AP
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具有对数非线性项的四阶阻尼wave equation方程解的寿命

Lifespan of solutions to a damped fourth-order wave equation with logarithmic nonlinearity

Yuzhu Han, Qi Li

摘要:

研究了具有对数非线性项的四阶阻尼波动方程解的寿命问题,建立了低、高初始能级下解的有限时间爆破准则,并给出了爆破时间的上界.通过构造一个新的辅助泛函,充分利用强阻尼项,得到了爆破时间的下界。

英文摘要:

This paper is devoted to the lifespan of solutions to a damped fourth-order wave equation with logarithmic nonlinearity $$u_{tt}+Δ^2u-Δu-ωΔu_t+α(t)u_t=|u|^{p-2}u\ln|u|.$$ Finite time blow-up criteria for solutions at both lower and high initial energy levels are established, and an upper bound for the blow-up time is given for each case. Moreover, by constructing a new auxiliary functional and making full use of the strong damping term, a lower bound for the blow-up time is also derived.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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