solve: Add option "solution_set"

[mkoeppe]

... along the same lines as sympy's solveset.

https://docs.sympy.org/latest/modules/solvers/solveset.html

Part of #31926

See also:

• Make solution_dict the default output for solve #10213 Make solution_dict the default output for solve

CC: @egourgoulhon @kcrisman @EmmanuelCharpentier

Component: symbolics

Issue created by migration from https://trac.sagemath.org/ticket/31935

[kcrisman]

comment:1

This would probably be useful for parsing a lot of Maxima answers as well (and, for that matter, Mathematica answers via the "free" interface to that); probably some of https://trac.sagemath.org/wiki/symbolics could be helped that way. (Well, obviously the sympy tickets like #24142!)

[kcrisman]

Description changed:

--- 
+++ 
@@ -3,3 +3,4 @@
 https://docs.sympy.org/latest/modules/solvers/solveset.html
 
 
+Part of #31926

[mkoeppe]

comment:3

Replying to @kcrisman:

(Well, obviously the sympy tickets like #24142!)

Thanks for the pointer!

[mkoeppe]

Description changed:

--- 
+++ 
@@ -4,3 +4,6 @@
 
 
 Part of #31926
+
+See also:
+- #10213 Make `solution_dict` the default output for `solve`