M. Bakonyi

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20032008

most citedExtensions of positive definite functions on amenable groups

4 citations · 4 across the 3 of their papers we have counts for

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math.FA2008★ 4 cited

Extensions of positive definite functions on amenable groups

M. Bakonyi, D. Timotin

Let $S$ be a subset of a amenable group $G$ such that $e \in S$ and $S^{- 1} = S$ . The main result of the paper states that if the Cayley graph of $G$ with respect to $S$ has a certain…

math.FA2005

Extensions of positive definite functions on free groups

M. Bakonyi, D. Timotin

An analogue of Krein's extension theorem is proved for operator-valued positive definite functions on free groups. The proof gives also the parametrization of all extensions by mea…