J. Hamhalter

activity

20022026

most citedMeasures of weak non-compactness in preduals of von Neumann algebras and JBW

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20 citations · 97 across the 17 of their papers we have counts for

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math.FA2017★ 9 cited

Measures of weak non-compactness in spaces of nuclear operators

Jan Hamhalter, Ondřej F. K. Kalenda

We show that in the space of nuclear operators from $ℓ^{q} (Λ)$ to $ℓ^{p} (J)$ the two natural ways of measuring weak non-compactness coincide. We also provide explicit formulas fo…

math.FA2015★ 12 cited

On Markushevich bases in preduals of von Neumann algebras

Martin Bohata, Jan Hamhalter, Ondřej F. K. Kalenda

We prove that the predual of any von Neumann algebra is $1$ -Plichko, i.e., it has a countably $1$ -norming Markushevich basis. This answers a question of the third author who proved…