#13202: conversion problems in BooleanPolynomialRing with degrevlex order
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Reporter: Bouillaguet | Owner: malb
Type: defect | Status: new
Priority: major | Milestone: sage-5.2
Component: commutative algebra | Resolution:
Keywords: conversion | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Description changed by Bouillaguet:
Old description:
> Some conversion between different BooleanPolynomial rings fail but they
> should not
>
> example :
> {{
> sage: B.<a,b,c,d> = BooleanPolynomialRing(order='degrevlex')
> sage: P.<c,d> = BooleanPolynomialRing(order='lex')
> sage: P(B('c'))
> ERROR: An unexpected error occurred while tokenizing input
> The following traceback may be corrupted or invalid
> The error message is: ('EOF in multi-line statement', (1369, 0))
> .......
> TypeError: cannot convert polynomial c to Boolean PolynomialRing in c, d:
> name b not defined
> }}
New description:
Some conversion between different !BooleanPolynomial rings fail but they
should not.
example :
{{{
sage: B.<a,b,c,d> = BooleanPolynomialRing(order='degrevlex')
sage: P.<c,d> = BooleanPolynomialRing(order='lex')
sage: P(B('c'))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (1369, 0))
.......
TypeError: cannot convert polynomial c to Boolean PolynomialRing in c, d:
name b not defined
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13202#comment:1>
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