#13800: sign error in Steenrod algebra multiplication
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Reporter: cnassau | Owner: jhpalmieri
Type: defect | Status: new
Priority: minor | Milestone: sage-5.5
Component: algebraic topology | Keywords: Steenrod algebra
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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There is a sign error in the Steenrod multiplication routine at odd
primes: with
{{{
A=SteenrodAlgebra(3)
Q=A.Q_exp
P=A.P
print (Q(0,1)*P(3))*Q(1,1)
print Q(0,1)*(P(3)*Q(1,1))
}}}
one gets
{{{
Q_0 Q_1 Q_2
2 Q_0 Q_1 Q_2
}}}
Only the 2nd answer is correct.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13800>
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