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arXiv 0901.0185math.AP
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具有临界弱耗散的非退化Kirchhoff方程的双曲-抛物型奇异扰动

Hyperbolic--parabolic singular perturbation for nondegenerate Kirchhoff equations with critical weak dissipation

Marina Ghisi, Massimo Gobbino

摘要:

考虑具有弱耗散的非退化Kirchhoff型拟线性方程的双曲-抛物奇异扰动问题。这意味着耗散项乘以系数b(t),当t趋于+无穷大时,系数b(t)趋于0。最近已经考虑了b(t)的行为类似于(1+t)^{-p}且p<1的情况。结果是双曲问题有唯一的整体解,并且双曲问题的解和抛物问题的相应解之间的差在t趋于+无穷大和当τ趋于0时都收敛到零。在本文中,我们表明,这些结果不能为真的p>1,但他们仍然是正确的,在临界情况下p=1。

英文摘要:

We consider the hyperbolic-parabolic singular perturbation problem for a nondegenerate quasilinear equation of Kirchhoff type with weak dissipation. This means that the dissipative term is multiplied by a coefficient b(t) which tends to 0 as t tends to +infinity. The case where b(t) behaves like (1+t)^{-p} with p<1 has recently been considered. The result is that the hyperbolic problem has a unique global solution, and the difference between solutions of the hyperbolic problem and the corresponding solutions of the parabolic problem converges to zero both as t tends to +infinity and as epsilon goes to 0. In this paper we show that these results cannot be true for p>1, but they remain true in the critical case p=1.

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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