October 2009 - GiNaC-devel

Upcoming GiNaC release
by Jens Vollinga 11 Oct '09

11 Oct '09

Hi everybody, I am finally going to make a 1.5.4 release soon (let's say next weekend). Are there any pending issues left? Regards, Jens

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[SCM] GiNaC -- a C++ library for symbolic computations branch, ginac_1-5, updated. release_1-4-0-217-gc7299e5
by git＠ginac.de 11 Oct '09

11 Oct '09

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, ginac_1-5 has been updated via c7299e51d5ecf61b5d85bdfeb9a2db536abf18bb (commit) from e710763e51b6fe11020bac880c44f426544471c2 (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 c7299e51d5ecf61b5d85bdfeb9a2db536abf18bb Author: Richard Kreckel <kreckel(a)ginac.de> Date: Sun Oct 11 23:19:21 2009 +0200 Add mul::info() and add::info() support for numeric info_flags. This way, GiNaC knows that the sum or product of a number of positive expressions is again a positive expression. [by Vladimir Kisil] ----------------------------------------------------------------------- Summary of changes: ginac/add.cpp | 12 ++++++++++++ ginac/flags.h | 2 +- ginac/mul.cpp | 12 ++++++++++++ ginac/power.cpp | 2 ++ 4 files changed, 27 insertions(+), 1 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_1-4-0-201-g5631205
by git＠ginac.de 11 Oct '09

11 Oct '09

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 5631205a455c42a32ce9d50b6c99df0f1ad6b4e7 (commit) from 9b5d06b34d3ee5f0ccd3c500be38fcdf61222956 (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 5631205a455c42a32ce9d50b6c99df0f1ad6b4e7 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Sun Oct 11 23:19:21 2009 +0200 Add mul::info() and add::info() support for numeric info_flags. This way, GiNaC knows that the sum or product of a number of positive expressions is again a positive expression. [by Vladimir Kisil] ----------------------------------------------------------------------- Summary of changes: ginac/add.cpp | 12 ++++++++++++ ginac/flags.h | 2 +- ginac/mul.cpp | 12 ++++++++++++ ginac/power.cpp | 2 ++ 4 files changed, 27 insertions(+), 1 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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GiNaC and polylogarithms
by Emanuele Bagnaschi 11 Oct '09

11 Oct '09

Hi, I'm a student of physics at the University of Milan (Italy), I was recently introduced to harmonic and multiple polylogarithms and their respective numerical evaluation methods. I was also asked to look at the implementations of these algorithms in GiNaC and, if possible, to improve the capabilities of this library. By testing the functions already provided and by reading the documentation I think I found a few things which are missing - correct me if I'm wrong and these functionalities are already implemented or are simply unneeded. First, G-functions currently evaluate numerically only for real arguments y >= 0. Secondly, in the tutorial is written that there's no support for compiling expressions containing polylogarithms to C function pointers. Finally, I see that there are some "TODO" comments in inifcns_nsdsums.cpp which describe missing features. I'm also open to any other suggestions. All comments are welcome. Best regards -- Emanuele A. Bagnaschi

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[SCM] GiNaC -- a C++ library for symbolic computations branch, ginac_1-5, updated. release_1-4-0-216-ge710763
by git＠ginac.de 04 Oct '09

04 Oct '09

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, ginac_1-5 has been updated via e710763e51b6fe11020bac880c44f426544471c2 (commit) via 71e1de972fd7f37d560427bffbb0f36215788d31 (commit) from 9fb17531da05d2959decc3856d03c71c0220b116 (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 e710763e51b6fe11020bac880c44f426544471c2 Merge: 71e1de972fd7f37d560427bffbb0f36215788d31 9fb17531da05d2959decc3856d03c71c0220b116 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Sun Oct 4 22:34:33 2009 +0200 Merge branch 'ginac_1-5' of ssh://www.ginac.de/srv/git/ginac into ginac_1-5 commit 71e1de972fd7f37d560427bffbb0f36215788d31 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Sun Oct 4 22:30:45 2009 +0200 Output LaTeX-symbols using \mathrm, instead of \mbox. Using \mathrm improves printing in complex formulae. One reason is that it scales in fractions. [by Vladimir Kisil] ----------------------------------------------------------------------- Summary of changes: ginac/constant.cpp | 6 +++--- ginac/inifcns.cpp | 4 ++-- ginac/inifcns_gamma.cpp | 2 +- ginac/inifcns_nstdsums.cpp | 6 +++--- 4 files changed, 9 insertions(+), 9 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_1-4-0-200-g9b5d06b
by git＠ginac.de 04 Oct '09

04 Oct '09

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 9b5d06b34d3ee5f0ccd3c500be38fcdf61222956 (commit) from ac235fa0a9285c055993bfa019896018db1817e6 (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 9b5d06b34d3ee5f0ccd3c500be38fcdf61222956 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Sun Oct 4 22:30:45 2009 +0200 Output LaTeX-symbols using \mathrm, instead of \mbox. Using \mathrm improves printing in complex formulae. One reason is that it scales in fractions. [by Vladimir Kisil] ----------------------------------------------------------------------- Summary of changes: ginac/constant.cpp | 6 +++--- ginac/inifcns.cpp | 4 ++-- ginac/inifcns_gamma.cpp | 2 +- ginac/inifcns_nstdsums.cpp | 6 +++--- 4 files changed, 9 insertions(+), 9 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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Powers of exponents
by Vladimir V. Kisil 04 Oct '09

04 Oct '09

Dear All, I noticed that exp() functions is not aware of power() method. As a results simple things like pow(exp(a), 2) are not simplified to exp(2*a). I am attaching the corresponding patch. 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, ginac_1-5, updated. release_1-4-0-214-g9fb1753
by git＠ginac.de 04 Oct '09

04 Oct '09

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, ginac_1-5 has been updated via 9fb17531da05d2959decc3856d03c71c0220b116 (commit) from 43d36593b9588b938a42a98f823c36c9f1ded088 (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 9fb17531da05d2959decc3856d03c71c0220b116 Author: Jens Vollinga <jensv(a)nikhef.nl> Date: Sun Oct 4 22:15:13 2009 +0200 Moved header includes to source files to avoid polluting the namespace for library users. ----------------------------------------------------------------------- Summary of changes: ginac/parser/default_reader.tpl | 7 +++++++ ginac/parser/parse_context.h | 6 ------ ginac/parser/parser.cpp | 6 ++++++ 3 files changed, 13 insertions(+), 6 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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