#14353: Factor toric morphism into surjective and generically injective
----------------------------------------------------+-----------------------
Reporter: vbraun | Owner:
AlexGhitza
Type: enhancement | Status:
needs_work
Priority: major | Milestone: sage-5.9
Component: algebraic geometry | Resolution:
Keywords: toric | Work issues: morphism
composition
Report Upstream: N/A | Reviewers: Andrey
Novoseltsev, Volker Braun
Authors: Volker Braun, Andrey Novoseltsev | Merged in:
Dependencies: | Stopgaps:
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Comment (by vbraun):
I think we shouldn't do more than implement the factorization in this
ticket, fixing composition of morphisms is another task. Though right now
this doctest fails, maybe you want to mark it as `# known bug`?
{{{
sage -t sage/schemes/toric/morphism.py
**********************************************************************
File "sage/schemes/toric/morphism.py", line 544, in
sage.schemes.toric.morphism.SchemeMorphism_fan_toric_variety.factor
Failed example:
prod(phi.factor()) == phi
Expected:
True
Got:
False
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14353#comment:8>
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