Make _repr_ of MILP more informative

[jdemeyer]

I am solving LP problems where I only care about feasibility and would prefer to see

Linear Program (no objective, 128 variables, 632 constraints)

instead of

Mixed Integer Program  ( maximization, 128 variables, 632 constraints )

Component: user interface

Keywords: days88, IMA coding sprints

Author: Jeroen Demeyer

Branch/Commit: b3e7322

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/23681

[jdemeyer]

Branch: u/jdemeyer/make__repr__of_milp_more_informative

[jdemeyer]

New commits:

aa5fa1d

Make `_repr_` of MILP more informative

[jdemeyer]

Commit: aa5fa1d

[tscrim]

Changed keywords from none to days88, IMA coding sprint

[tscrim]

Reviewer: Travis Scrimshaw

[tscrim]

comment:3

LGTM.

[tscrim]

Changed keywords from days88, IMA coding sprint to days88, IMA coding sprints

[sagetrac-git]

Changed commit from aa5fa1d to b3e7322

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1 and set ticket back to needs_review. New commits:

b3e7322

Use "constant objective" for non-zero constant objectives

[jdemeyer]

comment:6

I just realized that a constant objective function is essentially the same as a zero objective function. So it should also be special-cased. Please review the last commit.

[tscrim]

comment:7

Either way is fine with me.

[vbraun]

Changed branch from u/jdemeyer/make__repr__of_milp_more_informative to b3e7322