Add to check for fixed total/length in IntegerVector

[trevorkarn]

The current IntegerVector.check() method only checks for the positivity of each element. This adds a check for specified totals (n) and lengths (k).

This ticket also allows for any collections.abc.Sequence object to be checked as an integer vector.

CC: @tscrim @trevorkarn @darijgr

Component: combinatorics

Keywords: gsoc2022 integer-vector check

Author: Trevor K. Karn

Branch/Commit: 43e6813

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/34510

[trevorkarn]

Changed keywords from gsoc2022 to gsoc2022 integer-vector check

[trevorkarn]

comment:2

There is also a defect in this:

sage: IV33 = IntegerVectors(n=3, k=3)
sage: IV33([0])
[0]
sage: IV33([0]) in IV33
True

[trevorkarn]

Branch: u/tkarn/34510

[trevorkarn]

New commits:

c071210

Add tests, remove buggy check, add to check

[trevorkarn]

Commit: c071210

[tscrim]

comment:4

I would just check that it belongs to the parent. The first test should be done by that anyways.

Also, for the error message:

f"{self} is not an element of {self.parent()}"

[tscrim]

Reviewer: Travis Scrimshaw

[tscrim]

comment:5

Once changed and a green bot, positive review.