On 2014-02-13, Nathann Cohen <nathann.co...@gmail.com> wrote:
> Helloooooooooooo !!
>
>> Harald is looking for topics for Google Summer of Code, and I was
> wondering
>> if you thought this & some other issues w/MILP might be worth looking at.
>
> Hmmm... Well, I always thought that it would be nice to have a way to
> express constraints "formally". I mean : it would be nice to have
> "\sum_{i=0}^15 x_i <= 3" when you type p.show() rather than all individual
> constraints. That's fancy and useless stuff, but it would look
> sooooooooooooo cool !
>
> I have no idea how to implement this, though :-)
>
>> For example, I have an email from Dima from March 13th of last year
>> regarding constraint normalization, which I still haven't gotten round to
>> thinking about. Maybe there are other issues we could identify, as well.
>
> Hmmm.... Well, a way to check if a constraint is tight ? I am sure I have
> been asked this several times... O_oinfeasibility certifcates; I was lamenting about the lack of this feature. > >> Since linear programming is an important part of Sage, and also very >> accessible to undergraduates in both math and computer science (& maybe >> other disciplines as well: management? finance?) this could be appealing > -- >> what do you guys think? my posts about the dual simplex method and warm restart here are met with deafening silnce... Perhaps it's harder stuff than derived categories :-) > > Well, I use it a lot but unfortunately it does what I want it to do ^^; > > A bit like graphs.... It's getting boring these days :-P > > Nathann > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
