#20889: truncated power for polynomials
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-7.3
Component: algebra | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/20889 | 7e24e7abb3c962d90f4c64ec14adae17fe3e1fd9
Dependencies: | Stopgaps:
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Changes (by bruno):
* status: needs_review => needs_work
Comment:
* How much does it gain to statically type the arguments of the method?
One drawback is that you cannot do the following (though the computation
would be fast):
{{{#!python
sage: p = 7
sage: R.<x> = GF(p)[]
sage: f = x^2 + x + 1
sage: f.power_trunc(2^100, 1000)
Traceback (most recent call last):
...
OverflowError: long int too large to convert
}}}
* On a related note, do you think it may be useful to allow for a negative
power? The code could be as follows:
{{{#!python
if n < 0:
return self.inverse_series_trunc(prec).power_trunc(-n, prec)
}}}
* The first line of documentation is pretty terse...
--
Ticket URL: <https://trac.sagemath.org/ticket/20889#comment:5>
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