| Affiliation: | (1) Department of Mathematics, Stanford University, Stanford, CA 94305-2125, USA (e-mail: bump@math.stanford.edu) , US;(2) Department of Mathematics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong (e-mail: choi@maths.hku.hk) , HK;(3) Department of Mathematics, University of Georgia, Athens, GA 30602, USA (e-mail: kurlberg@math.uga.edu) , US;(4) University of Texas at Austin, Department of Mathematics RLM 8.100, Austin, TX 78712-1082, USA (e-mail: vaaler@math.utexas.edu) , US |
