39 citations · 88 across the 21 of their papers we have counts for
25 papers
A Banach algebra encoding quantum group duality
Jason Crann, Matthias Neufang
We introduce and study a new Banach algebra structure on the trace-zero subspace of trace class operators for any locally compact quantum group $\m…
Fejér representations for discrete quantum groups and applications
Jason Crann, Soroush Kazemi, Matthias Neufang
We prove that a discrete quantum group has the approximation property if and only if a Fejér-type representation holds for its -algebraic or von Neumann algebraic…
(Non-)amenability of and Banach space geometry
Matthew Daws, Matthias Neufang
Let be a Banach space, and the algebra of all bounded linear operators on . The question of amenability of goes back to Johnson's seminal mem…
Fixed points and limits of convolution powers of contractive quantum measures
Matthias Neufang, Pekka Salmi, Adam Skalski +1
We study fixed points of contractive convolution operators associated to contractive quantum measures on locally compact quantum groups. We characterise the existence of non-zero f…
A non-commutative Fejér theorem for crossed products, the approximation property, and applications
Jason Crann, Matthias Neufang
We prove that a locally compact group has the approximation property (AP), introduced by Haagerup-Kraus, if and only if a non-commutative Fejér theorem holds for the associated $C^…
Geometry of -algebras, the bidual of their projective tensor product, and completely bounded module maps
Matthias Neufang
Let be a -algebra, and consider the Banach algebra , where denotes the projective Banach space tensor product; if $…