A short computation of the norms of free convolution operators

Wolfgang Woess
1986 Proceedings of the American Mathematical Society  
Akemann and Ostrand in 1976 gave a formula for the norms of free convolution operators on the Z.2-space of a discrete group. Using random walk techniques and generating functions, a short and elementary computation of this formula is given.
doi:10.1090/s0002-9939-1986-0813831-3 fatcat:zcoa3nsv4jgs3c5uni74k3ahra