This article concerns the nonnegative solutions to the Cauchy problem
We investigate how the comparison principle, extinction in finite time, instantaneous shrinking of support, and existence of solutions depend on the behaviour of the coefficient .
Submitted December 5, 2002. Published April 8, 2004.
Math Subject Classifications: 35B05, 35K55.
Key Words: Comparison principle, extinction, shrinking of support, existence.
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| Junjie Li |
Department of Mathematicas, Yuquan Campus
Zhejiang University, Hangzhou 310027, China
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