July 2014 - GiNaC-devel

04 Jun '15

Hi, is there any reason not to define the derivative of the built-in abs() function as either abs(x)/x or csgn(x) ? Currently it has not derivative defined at all. Regards, Jan

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[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-428-g92da4c1
by git＠ginac.de 26 Jul '14

26 Jul '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 92da4c16f5d6edf276be011a08ce04b352945a83 (commit) from 4e53a7554e39c687b6cf467af3c967760ce3a521 (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 92da4c16f5d6edf276be011a08ce04b352945a83 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Fri Jul 25 23:11:11 2014 +0000 [bugfix] ex::is_polynomial(x): fix miscomputations The function power::is_polynomial(x) sometimes returned false, even if x did not occur in the power object. Thanks to Rubel Zilibowitz for reporting this bug. Similarly, mul::is_polynomial(x) sometimes returned true, even if x occurred only in the denominator of a rational function. The function mul::is_polynomial(x) does a simpler version of power::is_polynomial(x) on its factors. (It's simpler because the exponents cannot be functions of x.) ----------------------------------------------------------------------- Summary of changes: check/exam_paranoia.cpp | 14 ++++++++++++-- ginac/mul.cpp | 2 +- ginac/power.cpp | 15 ++++++++++----- 3 files changed, 23 insertions(+), 8 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_1-4-0-427-g4e53a75
by git＠ginac.de 22 Jul '14

22 Jul '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 4e53a7554e39c687b6cf467af3c967760ce3a521 (commit) from 13964f3416ec9de8829b57d4a2bbd9fe9a6db4ef (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 4e53a7554e39c687b6cf467af3c967760ce3a521 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Tue Jul 22 07:48:25 2014 +0000 Fix example of symmetrization in tutorial. The old example was illegal C++. Thanks to Rubel Zilibowitz for reporting this error. ----------------------------------------------------------------------- Summary of changes: doc/tutorial/ginac.texi | 6 +++--- 1 files changed, 3 insertions(+), 3 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_1-4-0-426-g13964f3
by git＠ginac.de 21 Jul '14

21 Jul '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 13964f3416ec9de8829b57d4a2bbd9fe9a6db4ef (commit) from edfa67d26bac695b5ef9911f3cda3ff50232e35a (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 13964f3416ec9de8829b57d4a2bbd9fe9a6db4ef Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)gmail.com> Date: Tue Jul 1 21:46:11 2014 +0300 [bugfix] log_series: avoid infinite recursion Check if the argument is on a branch cut check if it actually depends on the expansion variable before trying to expand around a different point in order to avoid the infinite recursion (or rather a segfault due to a stack overflow). Thanks to Mario Prausa for a bugreport. ----------------------------------------------------------------------- Summary of changes: check/exam_inifcns.cpp | 9 +++++++++ ginac/inifcns_trans.cpp | 4 ++++ 2 files changed, 13 insertions(+), 0 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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