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Description
Similar to #31653, given a continuous map \Phi: N -> M
and a manifold subset S
of M
, we define the pullback (preimage) of S
as the subset of N
of points p
with \Phi(p)
in S
.
Given a real scalar field Phi: N -> R
and a RealSet
S
, we define the pullback in the same way.
Also, we view a chart C
as a continuous function Phi: C.domain() -> R^n
and allow pulling back any subset of R^n
(an object with a __contains__
method; for example polyhedra, lattices, linear subspaces, tensor modules) by it as well.
In all cases, because Phi
is continuous, topological closures/interiors pull back.
An application is in #31981.
Depends on #31883
Depends on #31904
Depends on #31653
Depends on #31916
Depends on #31644
Depends on #31959
Depends on #31990
Depends on #21243
CC: @egourgoulhon @tscrim @mjungmath
Component: manifolds
Author: Matthias Koeppe
Branch/Commit: 4558e26
Reviewer: Eric Gourgoulhon
Issue created by migration from https://trac.sagemath.org/ticket/31688