#20243: Count real roots of polynomials using Sturm sequences
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Reporter: kedlaya | Owner: kedlaya
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-7.2
Component: algebra | Resolution:
Keywords: polynomials, | Merged in:
root-counting, days71 | Reviewers:
Authors: Kiran Kedlaya | Work issues:
Report Upstream: N/A | Commit:
Branch: | 8998591fa591991cfe6e03f65b13291edda0f11e
u/kedlaya/count_real_roots_of_polynomials_using_sturm_sequences| Stopgaps:
Dependencies: #20256 |
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Comment (by kedlaya):
OK, I changed the call syntax to polsturm. I also changed the call syntax
for count_roots_in_interval and all_roots_in_interval: they now take a
variable number of arguments, which should be either two numbers or one
interval. Moreover, I allow passing either None or -Infinity as a left
endpoint, and None or +Infinity as a right endpoint (converting them to
the Pari infinities).
I still haven't implemented an alias for all real roots (since I'm not
settled on the name) or checking the argument type.
--
Ticket URL: <http://trac.sagemath.org/ticket/20243#comment:14>
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