利用弱比较原理、古典分析技巧和能量方法,研究了一类退化抛物型方程初边值问题解的正性和长时间渐进行为,并给出了最大解的精确衰减率和熄灭集。所得结果推广和补充了该研究领域若干已有的结果。
By means of weak comparison theorem,classical analysis techniques and energy method,positivity and long time behavior of solutions for a degenerate parabolic equation are studied.Moreover,the precise decay rate and quenching set of the maximal weak solution are also determined.The results extend and supplement the previous works.