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Analysis of Heat Equations on Domains. (LMS-31) by El-Maati Ouhabaz

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Chapter Two

CONTRACTIVITY PROPERTIES

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of real Hilbert spaces, the real part 411562311 should of course be omitted in the statements.

2.1 INVARIANCE OF CLOSED CONVEX SETS

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2.2 POSITIVE AND -CONTRACTIVE SEMIGROUPS

The semigroup is holomorphic on H

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