March 2022 - GiNaC-devel

GiNaC 1.8.3 released
by Richard B. Kreckel 24 Mar '22

24 Mar '22

Hi, GiNaC 1.8.3 has been tagged. The News: * series_to_poly() can be used from ginsh. * Fix power::to_polynomial() for posint exponents. * Fix power::subs() in some special cases. As always, happy hacking, and a lovely UN International Day for the Right to the Truth Concerning Gross Human Rights Violations and for the Dignity of Victims! (24 March) -richy. -- Richard B. Kreckel <https://in.terlu.de/~kreckel/>

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[SCM] GiNaC -- a C++ library for symbolic computations tag, release_1-8-3, created. release_1-4-0-736-g216162e0
by Richard B. Kreckel 23 Mar '22

23 Mar '22

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_1-8-3 has been created at 216162e0b1a746a67f6c674b6bb30407306f1453 (commit) - Log ----------------------------------------------------------------- commit 216162e0b1a746a67f6c674b6bb30407306f1453 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Wed Mar 23 21:33:55 2022 +0100 Finalize 1.8.3 release. ----------------------------------------------------------------------- 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_1-4-0-736-g216162e0
by Richard B. Kreckel 23 Mar '22

23 Mar '22

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 216162e0b1a746a67f6c674b6bb30407306f1453 (commit) via aed514f534cc6b4438822c1fcf80c203a828a94c (commit) from b98ef824450d2897f5ea8f5254d614e6f8148d33 (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 216162e0b1a746a67f6c674b6bb30407306f1453 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Wed Mar 23 21:33:55 2022 +0100 Finalize 1.8.3 release. commit aed514f534cc6b4438822c1fcf80c203a828a94c Author: Richard Kreckel <kreckel(a)ginac.de> Date: Wed Mar 23 21:21:48 2022 +0100 Fix power::subs() in some special cases. In some cases, after subs'ing in basis and exponent, an extra substitution was performed. This could lead to messed-up final results because, e.g. substituting x==1/x in 1/x evaluated to x, but then another substitution x==1/x was performed. Reported by Feng Feng <f.feng(a)outlook.com>. ----------------------------------------------------------------------- Summary of changes: NEWS | 5 +++++ check/exam_misc.cpp | 18 ++++++++++++++++ doc/tutorial/ginac.texi | 2 +- ginac/power.cpp | 2 +- ginac/version.h | 4 ++-- m4/ax_cxx_compile_stdcxx.m4 | 51 +++++++++++++++++++++++++++++++++++++++++---- m4/host-cpu-c-abi.m4 | 8 +++---- m4/lib-ld.m4 | 6 +++--- m4/lib-link.m4 | 19 +++-------------- m4/lib-prefix.m4 | 15 ++++++------- 10 files changed, 90 insertions(+), 40 deletions(-) hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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web page
by Richard B. Kreckel 07 Mar '22

07 Mar '22

Hi, We've long protested against software patentability on the GiNaC web site. In my opinion it is now time to shift focus. I have removed the Anti Software Patents Demonstration and propose to replace it with this text tomorrow morning: Call for the End of War in Ukraine The pursuit of truth is a unifying element of all scientists. And science thrives best in international cooperation. Scientists and developers from many countries, including Russia and Ukraine, have contributed to GiNaC. Without these contributions, it would not be what it is today. We strongly support the call for peace [1]. We must make the Russian government understand the value and prospect of peaceful cooperation – they must end this war now and re-enable cooperation on all fields. Let's make science, not war! [1] <https://trv-science.ru/2022/02/we-are-against-war-all/> (Russian translation to follow.) I am posting this here to avoid some contributor being offended. I am also fully aware that this may be considered off-topic. If so, you're welcome to voice this here. -richy. -- Richard B. Kreckel <https://in.terlu.de/~kreckel/>

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Mysterious push_front()
by Jan Rheinländer 06 Mar '22

06 Mar '22

Hi, sometimes GiNaCs templates are a mystery to me. In container.h there is the code template<template<classT, class= std::allocator<T>> classC> container<C> & container<C>::prepend(constex & b) { ensure_if_modifiable(); this->seq.push_front(b); return*this; } but AFAIK the STL does not have any push_front() method. And GiNaC does not seem to define it either. How can this work? Same applies for pop_front() and sort() voidsort_(std::input_iterator_tag) { this->seq.sort(ex_is_less()); } Jan Rheinländer

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