A solution u of a Cauchy problem for a semilinear heat equationLet ϕ ∞ be the radially symmetric singular steady state. 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. We determine the exact blowup rate of Type II blowup solution with
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