[sage-support] True/False function about the solvability of linear programming

2019-04-28 Thread husihuang
Hello everyone! I would like to ask a question about the solvability of a linear programming problem. I use sagemath to check whether my LP problem has any feasible solution or not. The program is similar to the following one without details sage: p = MixedIntegerLinearProgram(maximization=False,

[sage-support] Re: True/False function about the solvability of linear programming

2019-04-28 Thread 'Peter Mueller' via sage-support
You can use an exception, something as follows: def is_lp_solvable(P): try: P.solve() return True except: return False Am Sonntag, 28. April 2019 14:31:31 UTC+2 schrieb husi...@gmail.com: > > Hello everyone! I would like to ask a question about the solvability of a

Re: [sage-support] Sage Crash Report

2019-04-28 Thread Erik Wallace
Yes, I downloaded via apt. The supporting python packages were also downloaded via apt. On Sat, Apr 27, 2019 at 5:08 PM Vincent Delecroix <20100.delecr...@gmail.com> wrote: > Hello, > > What did you downloaded exactly? You meant that you installed > Sage from via the package manager (apt)? > > Be

Re: [sage-support] Sage Crash Report

2019-04-28 Thread Vincent Delecroix
I do not see anything obvious in the crash report that explains the problem. For each thing below could you copy paste the full output of what appears in the console. 1. The list of sagemath packages installed $ apt list --installed | grep sagemath 2. Files in /usr/lib/python2.7/dist-package