Ticket #5468 (closed defect: fixed)
matrix creation over laurent polynomial rings
|Reported by:||wuthrich||Owned by:||malb|
A.<Y> = QQ R.<X> = LaurentPolynomialRing(A) matrix(R,2,2,[X,0,0,1])
TypeError: Unable to coerce X (<type 'sage.rings.polynomial.laurent_polynomial.LaurentPolynomial_mpair'>) to Rational
The same problem occurs with LaurentSeriesRing, but not with PowerSeriesRing.
I have not tried to chase where the problem actually comes from.