#16880: prime_power_range
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: number theory | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/16880 | e7b94588ee7ecb82c00afa48f905622f5c374cdd
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* dependencies: #16869, #16878 =>
Old description:
> The cythonization of `prime_powers` is much faster (around x4 in the
> timings). We introduce in a new function `prime_power_range` in
> `fast_arith.pyx` (that also has a keyword `py_ints` as `prime_range`).
>
> Note: naming conventions are crazy... right now there are:
> - `primes`: iterator over prime numbers
> - `prime_range`: return the list of the first prime (fast implementation
> in Cython but only handles integer up to `LONG_MAX` and require memory)
> - `prime_powers`: return the list of prime powers!
> It seems to me that in Sage we tend to have `X_iterator` for iterator and
> `Xs` for the list of objects...
New description:
The cythonization of `prime_powers` is much faster (around x4 in the
timings). We introduce in a new function `prime_power_range` in
`fast_arith.pyx` (that also has a keyword `py_ints` as `prime_range`).
--
Comment:
Rebased on 6.4.beta2, no dependency anymore...
Vincent
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Ticket URL: <http://trac.sagemath.org/ticket/16880#comment:5>
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