Opened 8 years ago
Closed 6 years ago
#15226 closed enhancement (invalid)
cython interface for libgiac: giacpy
Reported by: | frederichan | Owned by: | |
---|---|---|---|
Priority: | minor | Milestone: | sage-duplicate/invalid/wontfix |
Component: | interfaces | Keywords: | giac, cython, interface |
Cc: | jondo | Merged in: | |
Authors: | Reviewers: | Frederic Han | |
Report Upstream: | Reported upstream. No feedback yet. | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
I have done a sage version of giacpy (a cython interface for the giac library)
. The speed seems similar to giac's one, and I have experienced better interruptions than with the expect interface.
. The giac spkg is recommended: http://www.math.jussieu.fr/~han/xcas/sage/giac-1.1.0.spkg (cf Trac 12375)
. I have also experienced good timings with multivariate polynomials gcd, factorisation, and also with the new implementation in giac of grobner basis (revlex).
. Some examples and sage worksheets are available here: http://www.math.jussieu.fr/~han/xcas/giacpy/
Attachments (1)
Change History (12)
Changed 8 years ago by
comment:1 Changed 8 years ago by
- Report Upstream changed from Not yet reported upstream; Will do shortly. to Reported upstream. No feedback yet.
comment:2 Changed 7 years ago by
- Milestone changed from sage-6.1 to sage-6.2
comment:3 Changed 7 years ago by
- Milestone changed from sage-6.2 to sage-6.3
comment:4 follow-up: ↓ 5 Changed 7 years ago by
- Cc jondo added
comment:5 in reply to: ↑ 4 Changed 7 years ago by
Replying to jondo:
I would be interested in a giac interface, because Maxima lacks solving inequalities.
For small computations like this the text interface already in sage should be enough. The cython interface is much faster and have better interuptions but it is a more dangerous patch.
If you just want to test without patching sage, I have made a standalone version (cf the instructions at the end of this page)
comment:6 Changed 7 years ago by
Hi all, I am starting the comments, there something curious I remember, one coercion is much slowler than the other one (it is not the case in pure python).
from sage.libs.giac import * a=libgiac(2) sage: time l=[ a+1 for i in range(10**5)] CPU times: user 0.20 s, sys: 0.00 s, total: 0.20 s Wall time: 0.19 s sage: time l=[ 1+a for i in range(10**5)] CPU times: user 1.04 s, sys: 0.00 s, total: 1.04 s Wall time: 1.03 s
any idea?
comment:7 Changed 7 years ago by
- Milestone changed from sage-6.3 to sage-6.4
comment:8 Changed 6 years ago by
- Milestone changed from sage-6.4 to sage-duplicate/invalid/wontfix
The cython interface has been put in an the optional spkg: giacpy in trac #12375, so this old patch is now duplicate/obsolete
comment:9 Changed 6 years ago by
- Reviewers set to Frederic Han
- Status changed from new to needs_review
comment:10 Changed 6 years ago by
- Status changed from needs_review to positive_review
comment:11 Changed 6 years ago by
- Resolution set to invalid
- Status changed from positive_review to closed
I would be interested in a giac interface, because Maxima lacks solving inequalities.