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Minimal polynomials of matrices over SymbolicRing #18040

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pjbruin opened this issue Mar 23, 2015 · 5 comments
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Minimal polynomials of matrices over SymbolicRing #18040

pjbruin opened this issue Mar 23, 2015 · 5 comments
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c: symbolics p: minor / 4 t: enhancement
Milestone
sage-6.6

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@pjbruin
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pjbruin commented Mar 23, 2015

In Sage 6.6.rc0:

sage: M = matrix.identity(SR, 2)
sage: type(M)
<type 'sage.matrix.matrix_symbolic_dense.Matrix_symbolic_dense'>
sage: M.minpoly()
Traceback (most recent call last):
...
NotImplementedError: is_squarefree() is only implemented for polynomials over principal ideal domains

Trying to work around #11126 fails with a different error:

sage: SR in Fields()
True
sage: M.minpoly()
Traceback (most recent call last):
...
NotImplementedError:

This ticket implements minpoly() for matrices over SymbolicRing using the function minimalPoly() from Maxima's diag package.

Component: symbolics

Keywords: minimal polynomial symbolic maxima

Author: Peter Bruin

Branch/Commit: 35a3314

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/18040
@pjbruin pjbruin added this to the sage-6.6 milestone Mar 23, 2015
@pjbruin
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pjbruin commented Mar 23, 2015

Commit: 35a3314

@pjbruin
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pjbruin commented Mar 23, 2015

Branch: u/pbruin/18040-minimal_polynomial_SymbolicRing

@tscrim
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tscrim commented Mar 24, 2015

Reviewer: Travis Scrimshaw

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tscrim commented Mar 24, 2015

comment:2

LGTM.

@vbraun
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vbraun commented Apr 15, 2015

Changed branch from u/pbruin/18040-minimal_polynomial_SymbolicRing to 35a3314

@vbraun vbraun closed this as completed in 8c9977c Apr 15, 2015
@simon-king-jena simon-king-jena mentioned this issue Apr 15, 2015
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@sagetrac-duenez sagetrac-duenez mannequin mentioned this issue Dec 29, 2022
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c: symbolics p: minor / 4 t: enhancement
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