#14793: Unique representation for homsets
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Reporter: nthiery | Owner: nthiery
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.12
Component: categories | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Simon King | Merged in:
Dependencies: | Stopgaps:
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Comment (by SimonKing):
No, I did not find the solution.
The problem seems to be that the modular symbols space M is pickled the
*OLD* python way, hence, its `__dict__` is pickled. When M is unpickled,
some homspace accessible from an attribute of M is unpickled. Codomain and
domain of this homspace happen to be M --- and if the Hom function is
called with an uninitialised version of M, then stuff fails.
Solution: Provide a "proper" pickling for modular symbols.
Problem: I don't understand the modular symbols code.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14793#comment:9>
Sage <http://www.sagemath.org>
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