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

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652 S. Albeverio, A. Kosyak / Journal of Functional Analysis 236 (2006) 634–681<br />

Γ(g1,g2,...,gm) = <strong>de</strong>t Ĉ = <strong>de</strong>t(Ĉ − cppEqq + cppEqq)<br />

So we have proved the following <strong>le</strong>mma.<br />

= <strong>de</strong>t(Ĉ − cppEqq) + cppA q q(Ĉ − cppEqq)<br />

= Γ g1,g2,...,g p <br />

q ,...,gm + cppΓ(g1,g2,...,gq−1,gq+1,...,gm).<br />

Lemma 15. Let 1 r p

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