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Blow-up rate of type II and the braid group theory

2011
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Transactions of the American Mathematical Society
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A solution u of a Cauchy problem or a Cauchy-Dirichlet problem for a semilinear heat equation Let ϕ ∞ be the radially symmetric singular steady state of the Cauchy problem. Suppose that u 0 ∈ L ∞ is a radially symmetric function such that u 0 − ϕ ∞ and (u 0 ) t change sign at most finitely many times. By application of the braid group theory, we determine the exact blow-up rate of solution with initial data u 0 which undergoes type II blow-up in the case of p > p JL , where p JL is the exponent of Joseph and Lundgren.

doi:10.1090/s0002-9947-2010-04784-1
fatcat:l5thib2e6bhavhcjisbkm3m6eq