May 2015 - 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

5 8

Release 1.6.4
by Richard B. Kreckel 08 May '15

08 May '15

Hi, A new GiNaC release is out and available. These are the changes: * Fixed pow(+(...),2).expand() where the sum contained roots of rationals. * Various improvements for info(info_flags::nonnegative). * Make power::expand() (x*p)^c -> x^c * p^c, if p>0. * Fixed normal() where nested functions occur multiple times. * Add optional explicit derivatives to functions and use it in abs(), imag_part(), real_part(). * Evaluate abs(z)^(2n) -> z^n * conjugate(z)^n. Happy hacking -richy. -- Richard B. Kreckel <http://in.terlu.de/~kreckel/>

1 0

[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-452-g3e3c363
by git＠ginac.de 08 May '15

08 May '15

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 3e3c363cab88f5234ee6aaa80ee55463069b30a3 (commit) from 56055db8e4780d223f6ddc680fb09ef994691c1d (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 3e3c363cab88f5234ee6aaa80ee55463069b30a3 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Fri May 8 09:35:24 2015 +0200 Finalized 1.6.4 release. ----------------------------------------------------------------------- Summary of changes: INSTALL | 2 +- NEWS | 9 +++++++++ ginac/version.h | 4 ++-- 3 files changed, 12 insertions(+), 3 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

1 0

[SCM] GiNaC -- a C++ library for symbolic computations tag, ginac_1-6-4, created. release_1-4-0-452-g3e3c363
by git＠ginac.de 08 May '15

08 May '15

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_1-6-4 has been created at 3e3c363cab88f5234ee6aaa80ee55463069b30a3 (commit) - Log ----------------------------------------------------------------- commit 3e3c363cab88f5234ee6aaa80ee55463069b30a3 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Fri May 8 09:35:24 2015 +0200 Finalized 1.6.4 release. ----------------------------------------------------------------------- hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

1 0

[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-451-g56055db
by git＠ginac.de 07 May '15

07 May '15

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 56055db8e4780d223f6ddc680fb09ef994691c1d (commit) from 84e6538290cbd2b13b755254c62689a404ce91b4 (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 56055db8e4780d223f6ddc680fb09ef994691c1d Author: Richard Kreckel <kreckel(a)ginac.de> Date: Thu May 7 22:33:13 2015 +0200 Fix pow(+(...),2).expand(). Due to a failure to recombine coeffs and rests to expairs, expand((x+sqrt(2)*x)^2) returned x^2+2*x^2+2*sqrt(2)*x^2. The 2*x^2 term was not combined with the x^2 term to 3*x^2 because it was not the canonical expair [[x^2,2]] but rather [[2*x^2,1]]. Thanks to Isuru Fernando for the bugreport. ----------------------------------------------------------------------- Summary of changes: check/exam_paranoia.cpp | 13 +++++++++++++ ginac/power.cpp | 8 ++++---- 2 files changed, 17 insertions(+), 4 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

1 0