#20491: steenrod_algebra_basis exponents now rational, not integer
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Reporter: cnassau | Owner:
Type: PLEASE CHANGE | Status: new
Priority: major | Milestone: sage-7.2
Component: PLEASE CHANGE | Keywords: steenrod algebra
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The following regression seems to be new in Sage7.2.beta5:
{{{
sage: A=SteenrodAlgebra(2)
sage: for x in A.basis(d=1): print x,x*x
TypeError Traceback (most recent call
last)
...
TypeError: unsupported operand type(s) for &: 'int' and
'sage.rings.rational.Rational'
}}}
Source of the problem seems to be that `steenrod_algebra_basis` returns
Rational as entries:
{{{
sage: ((x,),) = steenrod_algebra_basis(1)
sage: print x,type(x)
1 <type 'sage.rings.rational.Rational'>
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/20491>
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