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具对数源的p-Laplacian型抛物方程解的爆破准则
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Abstract:
文章旨在研究一类具对数非线性源的p-Laplacian型伪抛物方程,该方程曾于[Comput.Math. Appl.73(2017)2076-2091]中被探讨。原文献应用位势井方法,针对亚临界和临界初始能量情 形,给出了解全局存在或有限时间爆破的阈值结果。本文构造了一个新的不变集,在超临界初始 能量情形下,确立了新的有限时间爆破准则,并进一步借助喷泉定理,阐明该问题在任意高初始 能量下总存在有限时间爆破解。此外,本文还从上方估计了爆破解的生命跨度。这部分结果拓展 了[Comput.Math.Appl.73(2017)2076-2091]中获得的爆破结论。
In this paper the authors investigate a p-Laplacian type pseudo-parabolic equation with logarithmic nonlinearity which was considered in [Comput. Math. Appl. 73(2017) 2076-2091], where threshold results for the solutions to exist globally or to blow up in finite time were given for subcritical and critical initial energy. A new finite time blow-up criterion for supercritical initial energy is established in this paper, which in particular implies that the problem admits finite time blow-up solutions at arbitrarily high initial energy level. Moreover, the lifespan of the blow-up solutions is estimated from above. This partially extends the blow-up results obtained in [Comput. Math. Appl. 73(2017) 2076-2091].
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