According to
http://en.wikipedia.org/wiki/Seifert_surface every knot or link is the boundary of a compact, connected, and oriented surface called a Seifert surface. Recently, I found SeifertView, a Windows application that generates and displays beautiful representations of such surfaces: http://www.win.tue.nl/~vanwijk/seifertview/index.htm Here's a gallery: http://www.win.tue.nl/~vanwijk/seifertview/knot_gallery.htm Unfortunately, the source code is not available. However, the author mentioned that the program is written in Delphi. Perhaps the literature contains a computational recipe we can adapt for Sage. Anyway, the binary does run on Linux, in emulation: wine seifertview.exe --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
