December 2022 - GiNaC-devel

[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-755-g3b979da1
by Richard B. Kreckel 29 Dec '22

29 Dec '22

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GiNaC -- a C++ library for symbolic computations". The branch, master has been updated via 3b979da1d5bbbc57dda660a5d9ba67abea30f70c (commit) via 3dde1c1a46cda22f908c8005771550a51c5aec33 (commit) from 4fd717045b56a15ee8602dfd005d7362db738d0a (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 3b979da1d5bbbc57dda660a5d9ba67abea30f70c Author: Richard Kreckel <kreckel(a)ginac.de> Date: Thu Dec 29 21:00:36 2022 +0100 Minor refactoring in factor.cpp. - Substitute the misnamed expt_pos(a,q) with the more specialized expt_pos_Q(w,a,q,r) function, for use by distinct_degree_factor(). - Rework canonicalize function and change semantics of its hint argument to be more natural. - Use the hint argument of canonicalize() in rem(). - Add some documenting comments. commit 3dde1c1a46cda22f908c8005771550a51c5aec33 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Fri Dec 23 00:44:23 2022 +0100 Some more minor optimizations in factor.cpp. This isn't changing much, but once I've seen a missed opportunity, it keeps catching the eye and then it's hard to resist. :-) ----------------------------------------------------------------------- Summary of changes: ginac/factor.cpp | 117 ++++++++++++++++++++++++------------------------------- 1 file changed, 51 insertions(+), 66 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-753-g4fd71704
by Richard B. Kreckel 22 Dec '22

22 Dec '22

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GiNaC -- a C++ library for symbolic computations". The branch, master has been updated via 4fd717045b56a15ee8602dfd005d7362db738d0a (commit) from 35a742a26893a534ddf1e51bd6d08f09dc927c43 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 4fd717045b56a15ee8602dfd005d7362db738d0a Author: Richard Kreckel <kreckel(a)ginac.de> Date: Thu Dec 22 18:19:59 2022 +0100 Fix internal next_prime(n) function. This helper function was doing wild things when called the wrong way. E.g. it would allocate obscene amounts of memory and run for ages when called with an argument that has never been returned by it before. In the context where it's being used so far this is not a problem. But it's better to make it foolproof and spare a new user some possible despair and distress. ----------------------------------------------------------------------- Summary of changes: ginac/factor.cpp | 40 +++++++++++++++++----------------------- 1 file changed, 17 insertions(+), 23 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-752-g35a742a2
by Richard B. Kreckel 19 Dec '22

19 Dec '22

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GiNaC -- a C++ library for symbolic computations". The branch, master has been updated via 35a742a26893a534ddf1e51bd6d08f09dc927c43 (commit) via 8f3ff73a0ff22d4855c2f8e798cc69db09af3263 (commit) via 1f14fb79bacd8de080c73a930bf9f8a5d514cbe0 (commit) from 7ddcbce353f5811a8967297eece3fdff7ae04f50 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 35a742a26893a534ddf1e51bd6d08f09dc927c43 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Mon Dec 19 20:17:55 2022 +0100 Prefer CLN left shift operations over multiplications in factor(). commit 8f3ff73a0ff22d4855c2f8e798cc69db09af3263 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Mon Dec 19 20:13:11 2022 +0100 Change some internal lst to exvector in factor.cpp... ...in places where c[i] is more readable than c.op(i) or the insidious c.let_op(i) notation. commit 1f14fb79bacd8de080c73a930bf9f8a5d514cbe0 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Mon Dec 19 18:14:32 2022 +0100 [BUGFIX] Fix corner cases of factor_multivariate(). In some rare cases, factor() failed with what looks like an endless loop trying evaluation homomorphisms with ever increasing moduli (or maybe it just took eons to complete). Whether this happened depended on which symbol was left unevaluated for univariate factorization. As a workaround for this problem, we now apply the evaluation homomorphism for each symbol in a round-robin mode until one of them succeeds. This somewhat speeds up factorization of multivariate polynomials even in those cases where the old implementation terminated in time. Thanks to Vitaly Magerya <vmagerya(a)gmail.com> for reporting this. ----------------------------------------------------------------------- Summary of changes: check/exam_factor.cpp | 37 +++++++ ginac/factor.cpp | 262 ++++++++++++++++++++++++++++---------------------- 2 files changed, 183 insertions(+), 116 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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