Estimation optimale du gradient du semi-groupe de la chaleur sur le ...

A. Porretta, L. Véron / Journal of Functional Analysis 236 (2006) 581–591 591
which extends a similar result in [9].
Corollary 1. Assume that g satisfies (2.2)–(2.4). Then any solution of (2.29) satisfies (2.17) and
verifies ∂ru>0 on ΓR,(R+r)/2.
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