3 papers
math.OA2019
Kawada-Itô-Kelley Theorem for Quantum Semigroups
Paweł Kasprzak, Fatemeh Khosravi, Piotr M. Sołtan
Idempotent states on locally compact quantum semigroups with weak cancellation properties are shown to be Haar states on a certain sub-object described by an operator system with c…
math.OA2016
Coideals, quantum subgroups and idempotent states
Pawel Kasprzak, Fatemeh Khosravi
We establish a one to one correspondence between idempotent states on a locally compact quantum group G and integrable coideals in the von Neumann algebra of bounded measurable fun…
math.OA2016
Integrable actions and quantum subgroups
Paweł Kasprzak, Fatemeh Khosravi, Piotr M. Sołtan
We study homomorphisms of locally compact quantum groups from the point of view of integrability of the associated action. For a given homomorphism of quantum groups $Π\colon\mathb…