February 2014 - GiNaC-devel

Another bug fix for the polylogs
by Stefan Weinzierl 12 Feb '14

12 Feb '14

Hello, attached is patch for a bug fix in the file inifcns_nstdsums.cpp. This bug is not related to any bug reported in January. The bug manifest itself that G-functions with trailing zeros and y<>1 are not calculated correctly. Description: The method G_do_hoelder is called from the method G_numeric. G_do_hoelder expects arguments without trailing zeros. (The reason is that G_do_hoelder uses the scaling relation, which is only valid for G-functions without trailing zeros.) Trailing zeros are handled by the method G_do_trafo. The patch ensures that the method G_numeric calls in the case of trailing zeros the method G_do_trafo and not G_hoelder. Best wishes, Stefan

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-423-g97ef604
by git＠ginac.de 12 Feb '14

12 Feb '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 97ef604e3da2e918cad6cb10af61f7d07999ed97 (commit) from 6304288112f2418a2f0a14076363646ec3ce2fa3 (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 97ef604e3da2e918cad6cb10af61f7d07999ed97 Author: Stefan Weinzierl <stefanw(a)thep.physik.uni-mainz.de> Date: Wed Feb 12 22:07:40 2014 +0200 G_numeric: fix numeric evaluation with trailing zeros and y != 1. Make sure G_numeric makes use of scaling relation (G_do_hoelder) only if there are no traling zeros. Use G_do_trafo otherwise (which can handle trailing zeros). ----------------------------------------------------------------------- Summary of changes: ginac/inifcns_nstdsums.cpp | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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RFC: step function and Pauli matrices
by Matthias Dellweg 05 Feb '14

05 Feb '14

Dear all, please consider the attached patches: GiNaC is able to check whether expressions are sums of possymbols. We can use that to evaluate some step functions immediately: 0001-Evaluate-step-whenever-possible.patch This should be a generic transformation from an integral with a step function to step functions times integrals without: 0002-Integrate-when-integrand-is-a-product-with-a-step-fu.patch This patch implements Pauli matrices in the same manner as in color.cpp (shamelessly borrowed...): 0003-Implementation-of-Pauli-matrices.patch As opposed to the color algebra, a product of pauli objects can always be reduced to a linear combination of single pauli objects: 0004-New-function-pauli_normalize.patch Best wishes, Matthias Dellweg

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-422-g6304288
by git＠ginac.de 03 Feb '14

03 Feb '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 6304288112f2418a2f0a14076363646ec3ce2fa3 (commit) from c42b47b4e23aea926597a9b4bee686d66d066470 (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 6304288112f2418a2f0a14076363646ec3ce2fa3 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Mon Feb 3 08:02:53 2014 +0000 [docs] remind users tho send EOF marker when doing input from cin. The example program waiting infinitely for EOF has confused at least one user: <http://www.ginac.de/pipermail/ginac-list/2014-January/001983.html> ----------------------------------------------------------------------- Summary of changes: doc/tutorial/ginac.texi | 4 +++- 1 files changed, 3 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_1-4-0-421-gc42b47b
by git＠ginac.de 02 Feb '14

02 Feb '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 c42b47b4e23aea926597a9b4bee686d66d066470 (commit) from 1172e1bef381de7fc303997c7790785132e2de88 (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 c42b47b4e23aea926597a9b4bee686d66d066470 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sun Feb 2 19:55:22 2014 +0200 Binary compatibilty has been broken, update the library version. commit 798d53ebb4da4e8e3865ed7bd7f31412fe2be3a7 (`Make it possible to override info() for functions.') overrides the function::info() virtual method. This breaks binary compatibility (adds a new entry in the middle of the vtable of the `function' class). The experimental proof of the above statement: ginsh linked with the previous release of libginac segfaults if libginac.so is upgraded to the current version. Thereore bump the library version. ----------------------------------------------------------------------- Summary of changes: ginac/version.h | 2 +- 1 files changed, 1 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_1-4-0-420-g1172e1b
by git＠ginac.de 02 Feb '14

02 Feb '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 1172e1bef381de7fc303997c7790785132e2de88 (commit) via f2efaa250656be56ffc66d6c98b3384fd8d9a60d (commit) via 741cfbcecd0d64faeb843823ece888758f2a9d84 (commit) via 244c5cb90b4650deebb237eaaadc02fb90ad7682 (commit) via bed06c78cdca3df4edccd26ef3cf913b1c82be76 (commit) via a2c08961530e08935a372913c9bc9bb5c3d89d27 (commit) via a81a2c92a099f07d9451f4d182484af40aa1fe4e (commit) via bee5f67dae5b409bc53ff71cb98f6630832540e7 (commit) from 5acfced77964d811d66f83e83b8fa06d77f3edd0 (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 1172e1bef381de7fc303997c7790785132e2de88 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sun Feb 2 12:56:46 2014 +0200 [build] Document that Python is required for building GiNaC. commit f2efaa250656be56ffc66d6c98b3384fd8d9a60d Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sun Feb 2 17:49:18 2014 +0200 [build] Fix `make pdf' for out of the source (auto* tools) build. commit 741cfbcecd0d64faeb843823ece888758f2a9d84 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sun Feb 2 17:47:38 2014 +0200 [build] Include the generated sources (function.{h,cpp}) into the tarball. commit 244c5cb90b4650deebb237eaaadc02fb90ad7682 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sat Feb 1 18:56:29 2014 +0200 [build] Include CMake related files into the tarball. commit bed06c78cdca3df4edccd26ef3cf913b1c82be76 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sat Feb 1 18:50:37 2014 +0200 [build] Include the helper scripts into the tarball. commit a2c08961530e08935a372913c9bc9bb5c3d89d27 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Fri Jan 31 21:46:26 2014 +0200 check: auto* tools build: compile and run check_mul_info. commit a81a2c92a099f07d9451f4d182484af40aa1fe4e Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Tue Jan 28 08:59:48 2014 +0200 [build] ginsh: fix `make distcheck' failure. commit bee5f67dae5b409bc53ff71cb98f6630832540e7 Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Sat Jan 18 14:13:46 2014 +0200 log_eval: don't apply the log(x^p) -> p*log(x) rule. Automatically transforming log(p^2) into 2 log(p) might be quite annoying. Perhaps this transformation should be moved to expand() and applied only if expand_options::expand_transcendental is specified. ----------------------------------------------------------------------- Summary of changes: INSTALL | 3 ++- Makefile.am | 12 +++++++++++- check/Makefile.am | 5 +++++ check/exam_inifcns.cpp | 3 --- doc/Makefile.am | 1 + doc/examples/Makefile.am | 2 +- doc/reference/Makefile.am | 3 ++- doc/tutorial/Makefile.am | 2 +- ginac/Makefile.am | 3 ++- ginac/inifcns_trans.cpp | 5 ----- ginsh/Makefile.am | 6 +++--- tools/Makefile.am | 2 +- 12 files changed, 29 insertions(+), 18 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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