#10540: Spec and patches for singular affine toric varieties / algebraic schemes
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Reporter: vbraun | Owner: AlexGhitza
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7.1
Component: algebraic geometry | Keywords: sd31
Work_issues: | Upstream: N/A
Reviewer: Andrey Novoseltsev | Author: Volker Braun
Merged: | Dependencies: #9918, #10525, #10023,
#10529
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Changes (by vbraun):
* keywords: => sd31
* work_issues: doctest failures =>
Comment:
Andrey reported a performance regression in Sage-4.7.1.alpha2 for the long
doctests. The reason is that the syntax for computing the LLL-reduced
kernel changed from `A.right_kernel(LLL=True)` to
`A.right_kernel(basis='LLL')`. Unfortunately #10746 did not add a
deprecation warning, but then we were the only users of the `LLL=True`
syntax. The result was that Sage-4.7.1.alpha2 computed the naive ideal
with the echelon form of the kernel and not the LLL-reduced form, which
makes the Groebner basis computations much much harder.
The updated patch switches to the new syntax and works as fast as before.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10540#comment:12>
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