Opened 9 years ago

Last modified 8 years ago

#13438 closed task

univariate polynomial _xgcd only over fields — at Initial Version

Reported by: saraedum Owned by: AlexGhitza
Priority: trivial Milestone: sage-5.12
Component: basic arithmetic Keywords: gcd, xgcd, beginner sd51
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Description

sage.rings.polynomial.polynomial_element.Polynomial provides an implementation for _xgcd. This implementation is not correct for polynomials over arbitrary rings. Therefore it should be moved to sage.rings.polynomial.polynomial_element_generic.Polynomial_generic_field.

The way it currently is doesn't cause any bugs because only elements of PID call the _xgcd method. Nevertheless it should imho be moved.

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