On 2014-02-26, mmarco <mma...@unizar.es> wrote: > Thanks for the link. I have tried to compile it, but got this error message: > > /usr/bin/ld: cannot open output file ./bin/knotfind: No such file or > directory > collect2: error: ld returned 1 exit status > make: *** [knotfind] Error 1 > I see. Make an empty directory bin/ in ./ before doing "make all".
Then it will work. On platforms I checked bin/ is created on the fly... I'll fix this in the repo. > > El martes, 25 de febrero de 2014 23:17:56 UTC+1, Dima Pasechnik escribió: >> >> On 2014-02-25, mmarco <mma...@unizar.es <javascript:>> wrote: >> > I would be happy to mentor a student in a knot theory related project in >> > sage. I had mainly two ideas: >> > >> > First idea is to write a class for knots/links. This class should be >> able >> > to translate between the different possible representations of links >> (Gauss >> > codes, 3d curves, braid closure...) and compute some of their invariants >> > (the usual polynomials, Seifert forms, fundamental groups...). It should >> > also produce pictures of knot diagrams and 3d representations of the >> > knot/link. Some (or most) of this features can be either written from >> > scratch, or just wrap external code (like the mentioned SnapPy). >> >> perhaps one can try to incorporate parts of knotscape into Sage. >> Well, it's kind of old, but still works: >> https://github.com/dimpase/knotscap >> (incidentally, a colleague wanted to use knotscape on a modern Linux >> system, so I did these small fixes for him) >> >> >> > >> > Another idea, closely related to the previous one, is to write a >> javascript >> > editor for knots and links, following what knotplot [1] does. This can >> be >> > part of the same project or a separated one, if someone else writes the >> > backend (although i think that it should be possible to write the editor >> > and a simple backend in a single gsoc project, but that can be >> discussed). >> > An important part of this editor would be the algorithm for dynamically >> > relaxing the link. In particular, such an algorithm is explained in >> chapter >> > 7 of Scharein's thesis [1]. >> > >> > [1] http://www.knotplot.com/thesis/thesis.html >> > >> >> > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
