#12147: Binary NTL Finite field elements can't coerce to GF(2)
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Reporter: jsrn | Owner: AlexGhitza
Type: defect | Status: new
Priority: minor | Milestone: sage-4.8
Component: algebra | Keywords: finite field, algebra
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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For Finite fields when an element also exists in a subfield it should
support coercion. This is not always possible for binary ntl fields and
its prime subfield GF(2).
{{{
sage: Fbig.<a> = GF(2^18)
one = a^(2^18-1)
GF(2)(one)
<BOOM>
TypeError: unable to coerce <type
'sage.rings.finite_rings.element_ntl_gf2e.FiniteField_ntl_gf2eElement'> to
an integer
}}}
It seems to work for other finite field characteristics.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12147>
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