#17695: Slightly fasten is_cyclotomic()
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Reporter: bruno | Owner:
Type: enhancement | Status: new
Priority: minor | Milestone: sage-6.5
Component: number theory | Keywords:
Merged in: | Authors: Bruno Grenet
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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In `src/sage/rings/polynomial/polynomial_element.pyx`, the method
`is_cyclotomic()` begins with checking the irreducibility of the input
polynomial, and then checks the leading and constant coefficients. I
simply propose to invert those tests to fasten a bit the test for
polynomials that are not monic or whose constant coefficient is not `1`.
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Ticket URL: <http://trac.sagemath.org/ticket/17695>
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