- GiNaC-devel - ginac.de

Small simplify_indexed() patch
by Vladimir V. Kisil 21 Jan '15

21 Jan '15

Dear All, I wish to propose for a discussion a small patch to indexed.cpp. I looked at the raised issue with slow performance in contracting Dirac gammas. The present algorithm does this recursively, in Vladyslav's example the deepness may reach 140 nested calls. The proposed patch reduced it around to 100 levels by avoiding to call simplify_indexed() if it will re-direct to simplify_indexed_product() anyway. However, I shall say that the patch only marginally improves timing: by a couple of percents at best. Best wishes, Vladimir -- Vladimir V. Kisil email: kisilv(a)maths.leeds.ac.uk www: http://www.maths.leeds.ac.uk/~kisilv/ Book: Geometry of Mobius Transformations http://www.worldscientific.com/worldscibooks/10.1142/p835

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-438-gf72e191
by git＠ginac.de 31 Dec '14

31 Dec '14

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 f72e1912c287b73a91fda054c6ca68440fb8d0ca (commit) from cfdc2c31088bb196426dd071de5181248df2e160 (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 f72e1912c287b73a91fda054c6ca68440fb8d0ca Author: Vladimir V. Kisil <kisilv(a)maths.leeds.ac.uk> Date: Wed Dec 31 18:07:26 2014 +0000 Evaluate abs(z)^(2n) -> z^n * conjugate(z)^n. ----------------------------------------------------------------------- Summary of changes: ginac/inifcns.cpp | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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Re: [GiNaC-devel] morusaka@libero.it n
by morusaka 29 Nov '14

29 Nov '14

http://www.sawserviceab.com/eowk/rmdzywxjyujxqzhqtjjhenuvric.ikiesnlnuekovn… morusaka(a)libero.it

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Release 1.6.3
by Richard B. Kreckel 28 Nov '14

28 Nov '14

Hi everybody, Alexei and I have prepared a new release and are happy to announce that GiNaC 1.6.3 is out and available. These are the changes: * New expand_options::expand_transcendental. GiNaC will apply additional rules when expanding expressions if this option is specified, i.e. log(a*b) -> log(a) + log(b) exp(a + b) -> exp(a)*exp(b) * Functions can define a custom expand() and info() now. * Automatically rewrite (x^{-1})^c -> x^{-c} for positive c. * Transform abs(x)^n -> x^n if x is real and n is even. * Improved power::info(): power with a real base and even exponent reports that it's non-negative. * Fixed spurious match failure due to expairseq::match() bug: > match(sin(y)*exp(b)+sin(x)*exp(a), sin($0)*exp(a)+exp(b)*sin($1)) FAIL * Fixed power::is_polynomial() and mul::is_polynomial() computation. * factor_univariate correctly handles polynomials over rationals (no segfaults any more). * Fixed an infinite loop in factor_multivariate due to incorrect handling of polynomials having a leading coefficient being a sum with a non-trivial integer content. * Fixed numeric evaluation of generalized multiple polylogarithms for real and negative argument. * Avoid calling log(1-x) in numeric evaluation of classical polylogarithm. * Fixed numeric evaluation of multiple polylogarithms (correctly set the signs of the imaginary parts in the intermediate expression). * Fixed numeric evaluation of Nielsen polylogs for arguments close to the 6th root of unity or its conjugate. * Avoid infinite recursion in series expansion of logarithm. * numeric::info(info_flags::nonnegative) correctly handles complex numbers with non-zero imaginary part. * Fixed several build issues: - libreadline and dlopen() misdetection. - multiple definition of symbol on MinGW. - auto* tools and texinfo being unhappy in various ways. * GiNaC can be built with CMake now. Regards, -richy. -- Richard B. Kreckel <http://in.terlu.de/~kreckel/>

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[SCM] GiNaC -- a C++ library for symbolic computations tag, ginac_1-6-3, created. release_1-4-0-437-gcfdc2c3
by git＠ginac.de 27 Nov '14

27 Nov '14

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 tag, ginac_1-6-3 has been created at cfdc2c31088bb196426dd071de5181248df2e160 (commit) - Log ----------------------------------------------------------------- commit cfdc2c31088bb196426dd071de5181248df2e160 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Thu Nov 27 21:29:39 2014 +0000 Finalized 1.6.3 release. Updated NEWS file, moved some comments so Doxygen won't be confused. ----------------------------------------------------------------------- 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_1-4-0-437-gcfdc2c3
by git＠ginac.de 27 Nov '14

27 Nov '14

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 cfdc2c31088bb196426dd071de5181248df2e160 (commit) from 55a08d9cb9005bb10def92d5e8f5a816003da16b (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 cfdc2c31088bb196426dd071de5181248df2e160 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Thu Nov 27 21:29:39 2014 +0000 Finalized 1.6.3 release. Updated NEWS file, moved some comments so Doxygen won't be confused. ----------------------------------------------------------------------- Summary of changes: NEWS | 11 ++++------- ginac/crc32.h | 8 +++++--- ginac/hash_seed.h | 27 ++++++++++++++++----------- 3 files changed, 25 insertions(+), 21 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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[SCM] GiNaC -- a C++ library for symbolic computations tag, release_1-6-3, created. release_1-4-0-437-g2c7d26f
by git＠ginac.de 27 Nov '14

27 Nov '14

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 tag, release_1-6-3 has been created at 2c7d26f82ab2938ccc42372459a6640137a910a1 (commit) - Log ----------------------------------------------------------------- commit 2c7d26f82ab2938ccc42372459a6640137a910a1 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Thu Nov 27 21:29:39 2014 +0000 Finilized 1.6.3 release. Updated NEWS file, moved some comments so Doxygen won't be confused. ----------------------------------------------------------------------- hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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Derivative of conjugated and even power of modulus (resubmission)
by Vladimir V. Kisil 29 Oct '14

29 Oct '14

Dear All, I am attaching two simple patches which were submitted in Nov 2013, and discussed at http://www.ginac.de/pipermail/ginac-devel/2013-November/ The first patch was modified after this discussion and no further objection were raised to either of them. Best wishes, Vladimir -- Vladimir V. Kisil email: kisilv(a)maths.leeds.ac.uk -- www: http://maths.leeds.ac.uk/~kisilv/

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-436-g55a08d9
by git＠ginac.de 27 Oct '14

27 Oct '14

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 55a08d9cb9005bb10def92d5e8f5a816003da16b (commit) from cca88b51436e4b654d16a4d60cd0d1c66fcf5dd6 (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 55a08d9cb9005bb10def92d5e8f5a816003da16b Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sun Jan 19 19:50:23 2014 +0200 Prepare for 1.6.3 release. ----------------------------------------------------------------------- Summary of changes: NEWS | 38 ++++++++++++++++++++++++++++++++++++++ ginac/version.h | 2 +- 2 files changed, 39 insertions(+), 1 deletion(-) 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_1-4-0-435-gcca88b5
by git＠ginac.de 14 Oct '14

14 Oct '14

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