Convert piecewise functions to SymPy

[rwst]

The SymPy version of piecewise is an ordered list of conditions. To convert our interval-based piecewise functions a dedicated algorithm inside symbolic/expression_conversions.py is needed.

CC: @rwst

Component: interfaces

Author: Frédéric Chapoton

Branch/Commit: 000edf6

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/21412

[rwst]

comment:1

In #23923 the conversion of the formal piecewise function cases is implemented.

[fchapoton]

Commit: 052bed2

[fchapoton]

Author: Frédéric Chapoton

[fchapoton]

Branch: u/chapoton/21412

[fchapoton]

comment:2

Here is a proposal

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New commits:

052bed2

convert real sets and piecewise functions to sympy

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

000edf6

fix

[sagetrac-git]

Changed commit from 052bed2 to 000edf6

[tscrim]

comment:5

LGTM.