Convolutions on the Haagerup tensor products of Fourier algebras

Mehdi Rostami, Nico Spronk

We study the ranges of the maps of convolution $u\otimes v\mapsto u\ast v$ and a `twisted' convolution $u\otimes v\mapsto u\ast \check{v}$ ($\check{u}(s)=u(s^{-1})$) and on the Haa…