J. Hamhalter

activity

20022026

collaborators

Showing 2019Show all

3 papers · 1 filter

math.OA2019

Finite tripotents and finite JBW $^{*}$ -triples

Jan Hamhalter, Ondřej F. K. Kalenda, Antonio M. Peralta

We study two natural preorders on the set of tripotents in a JB $^{*}$ -triple defined in terms of their Peirce decomposition and weaker than the standard partial order. We further int…

math.OA2019

Grothendieck's inequalities for JB $^{*}$ -triples: Proof of the Barton-Friedman conjecture

Jan Hamhalter, Ondřej F. K. Kalenda, Antonio M. Peralta +1

We prove that, given a constant $K > 2$ and a bounded linear operator $T$ from a JB $^{*}$ -triple $E$ into a complex Hilbert space $H$ , there exists a norm-one functional $ψ \in E^{*}$ sa…

math.OA2019

Measures of weak non-compactness in preduals of von Neumann algebras and JBW $^{*}$ -triples

Jan Hamhalter, Ondřej F. K. Kalenda, Antonio M. Peralta +1

We prove, among other results, that three standard measures of weak non-compactness coincide in preduals of JBW $^{*}$ -triples. This result is new even for preduals of von Neumann alg…

Finite tripotents and finite JBW∗-triples

Grothendieck's inequalities for JB∗-triples: Proof of the Barton-Friedman conjecture

Measures of weak non-compactness in preduals of von Neumann algebras and JBW∗-triples

Finite tripotents and finite JBW $^{*}$ -triples

Grothendieck's inequalities for JB $^{*}$ -triples: Proof of the Barton-Friedman conjecture

Measures of weak non-compactness in preduals of von Neumann algebras and JBW $^{*}$ -triples