Affiliation: | (1) Mathematical Sciences, Loyola University Chicago, Chicago, IL 60626, USA (e-mail: doty@math.luc.edu) , US;(2) Mathematical Institute, Oxford University, 24-29 St. Giles, Oxford, OX1 3LB, UK (e-mail: erdmann@vax.ox.ac.uk) , GB;(3) Magdalene College, Cambridge University, Cambridge, CB3 0AG, UK (e-mail: s.martin@pmms.cam.ac.uk) , GB;(4) Department of Mathematics and Statistics, Utah State University, Logan, UT 84322, USA (e-mail: nakano@sunfs.math.usu.edu) , US |