Make Ehrhart series related function cached

[jplab]

Currently, the construction for ehrhart_series and other related methods in backend_normaliz are not cached, which means that they need to be recreated every time they are called.

These functions should be cached.

CC: @sophiasage @kliem

Component: geometry

Keywords: ehrhart, h star vector

Author: Jean-Philippe Labbé, Jonathan Kliem

Branch/Commit: b397c07

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/29196

[mkoeppe]

comment:1

Batch modifying tickets that will likely not be ready for 9.1, based on a review of the ticket title, branch/review status, and last modification date.

[jplab]

Author: Jean-Philippe Labbé

[jplab]

comment:2

First version. Did I miss something?

---

New commits:

b70549b	First version of pickled ehrhart stuff
0a45ea8	pep8

[jplab]

Commit: 0a45ea8

[jplab]

Changed keywords from none to ehrhart, h star vector

[jplab]

Branch: public/29196

[jplab]

comment:4

This is the first try. The tests are not passing. It needs some fixing.

[jplab]

Work Issues: Failing doctests, hilbert series is not hashable