Andrew J. Casson Department of Mathematics Yale University 10 Hillhouse Ave New Haven, CT 06520 andrew.casson@math.yale.edu

David Gabai Department of Mathematics Princeton University Fine Hall, Washington Road Princeton, NJ 08544 gabai@princeton.edu

Curtis T. McMullen Department of Mathematics Harvard University 1 Oxford Street Cambridge, MA 02138 ctm@math.harvard.edu

Clifford H. Taubes Department of Mathematics Harvard University 1 Oxford Street Cambridge, MA 02138 chtaubes@math.harvard.edu

Michael H. Freedman Theory Group Microsoft Research One Microsoft Way Redmond, WA 98052 michaelf@microsoft.edu

Leonid Polterovich Department of Mathematic School of Mathematical Sciences Tel Aviv University 69978 Tel Aviv, Israel polterov@post.tau.ac.il

All contents Copyright 1998  2013. All rights reserved. Permission to copy without change for nonprofit purposes is granted.