I've been inactive for close to a year due to illness--and want to resume my activity as in
Euclidean volume of the unit ball of matrices under the matrix norm
but when I try to do so, I get treated as a first-time user--https://mathoverflow.net/users/245703/paul-b-slater. (My university migrated my email slater@kitp.ucsb.edu to a gmail account--paulslater@ucsb.edu, and there seems to be some mess about login id's.)