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Fractional decay bounds for nonlocal zero order heat equations

Abstract : In this paper we obtain bounds for the decay rate for solu- tions to the nonlocal problem ∂t u(t, x) = Rn J(x, y)[u(t, y) − u(t, x)]dy. Here we deal with bounded kernels J but with polynomial tails, that is, we assume a lower bound of the form J(x, y) ≥ c1 |x − y|^−(n+2σ) , for |x − y| > c2 . Our estimates takes the form u(t) Lq (Rn ) ≤ C t^{− n/2σ (1−1/q)} for t large.
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Submitted on : Thursday, July 11, 2013 - 11:50:28 PM
Last modification on : Tuesday, January 11, 2022 - 5:56:08 PM
Long-term archiving on: : Saturday, October 12, 2013 - 11:30:07 AM

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Emmanuel Chasseigne, Patricio Felmer, J. Rossi, Erwin Topp. Fractional decay bounds for nonlocal zero order heat equations. Bulletin of the London Mathematical Society, London Mathematical Society, 2014, 46, pp.943-952. ⟨10.1112/blms/bdu042⟩. ⟨hal-00843685⟩

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