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Sharp logarithmic Sobolev inequalities on free groups by variational comparison

Yao, Gan
arXiv (OAI Expanded) · Papers
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functional-analysisoperator-algebras
We give a variational comparison proof of the sharp logarithmic Sobolev inequality with constant $2$ for the word-length Poisson semigroup on free group von Neumann algebras. Our approach extends the Lagrange method for cyclic groups in [Yao26] to a framework in finite tracial von Neumann algebras.
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