#13284: Some conversion between BooleanPolynomialRing and QQ[.....] are missing
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Reporter: Bouillaguet |
Owner: malb
Type: defect |
Status: needs_review
Priority: minor |
Milestone: sage-5.3
Component: commutative algebra |
Resolution:
Keywords: conversion | Work
issues:
Report Upstream: None of the above - read trac for reasoning. |
Reviewers: Charles Bouillaguet
Authors: Alexander Dreyer | Merged
in:
Dependencies: |
Stopgaps:
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Description changed by Bouillaguet:
Old description:
> For some reason, it is impossible to directly build the (standard
> benchmark) cyclic ideals over !BooleanPolynomialRing
> {{{
> sage: from sage.rings.ideal import Cyclic
> sage: R = BooleanPolynomialRing(10, 'x')
> sage: I = Cyclic(R)
> ***BOOOM***
> ....
> TypeError: cannot convert <type
> 'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomial_libsingular'>
> to BooleanPolynomial
> }}}
>
> Note that there is a possible workaround:
> {{{
> sage: R = BooleanPolynomialRing(10, 'x')
> sage: R2 = PolynomialRing(GF(2), 10, 'x')
> sage: I = ideal([ R(f) for f in Cyclic(R2).gens()])
> }}}
>
> Note that from a mathematical point of view, this is not a very
> interesting example since this ideal is rather trivial in the boolean
> polynomial ring... yet something is wrong...
>
> '''Apply''' [attachment:13284_boolean_conversion.patch]
New description:
For some reason, it is impossible to directly build the (standard
benchmark) cyclic ideals over !BooleanPolynomialRing
{{{
sage: from sage.rings.ideal import Cyclic
sage: R = BooleanPolynomialRing(10, 'x')
sage: I = Cyclic(R)
***BOOOM***
....
TypeError: cannot convert <type
'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomial_libsingular'>
to BooleanPolynomial
}}}
Note that there is a possible workaround:
{{{
sage: R = BooleanPolynomialRing(10, 'x')
sage: R2 = PolynomialRing(GF(2), 10, 'x')
sage: I = ideal([ R(f) for f in Cyclic(R2).gens()])
}}}
Note that from a mathematical point of view, this is not a very
interesting example since this ideal is rather trivial in the boolean
polynomial ring... yet something is wrong...
'''Apply''' [attachment:13284_boolean_conversion_rebased-5.3rc1.patch]
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13284#comment:19>
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