June 2021 - GiNaC-devel

[SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-717-gdcb735fe
by Stefan Weinzierl 09 Jun '21

09 Jun '21

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 dcb735feae4c3a6962a7824e03b0ce4496e3ffe7 (commit) from ef7787a325ea1f272ea08d78f2b86c48b6b2b286 (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 dcb735feae4c3a6962a7824e03b0ce4496e3ffe7 Author: Stefan Weinzierl <weinzierl(a)uni-mainz.de> Date: Wed Jun 9 14:10:23 2021 +0200 Bug fix in the routine H_evalf (a minus sign should not be forgotten). This bug was reported by Bin Zhou. ----------------------------------------------------------------------- Summary of changes: ginac/inifcns_nstdsums.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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_1-4-0-716-gef7787a3
by Richard B. Kreckel 06 Jun '21

06 Jun '21

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 ef7787a325ea1f272ea08d78f2b86c48b6b2b286 (commit) via 7e268ccc7dc68f4e1ca3452f95951b9e8a76f03e (commit) from 3956eb4456d23f7ba937d9b2b726c1b6eac64530 (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 ef7787a325ea1f272ea08d78f2b86c48b6b2b286 Author: Richard Kreckel <kreckel(a)ginac.de> Date: Sun Jun 6 14:48:00 2021 +0200 Add simple exam test for releational objects. commit 7e268ccc7dc68f4e1ca3452f95951b9e8a76f03e Author: Vladimir V. Kisil <V.Kisilv(a)leeds.ac.uk> Date: Sun Jun 6 14:00:50 2021 +0200 Smarter relational to Boolean conversion. If a relational contains symbolic entries we look to ex::info to decide whether it can be converted to true value. ----------------------------------------------------------------------- Summary of changes: check/.gitignore | 2 + check/CMakeLists.txt | 1 + check/Makefile.am | 4 ++ check/exam_relational.cpp | 135 ++++++++++++++++++++++++++++++++++++++++++++++ ginac/relational.cpp | 55 ++++++++++++------- 5 files changed, 178 insertions(+), 19 deletions(-) create mode 100644 check/exam_relational.cpp hooks/post-receive -- GiNaC -- a C++ library for symbolic computations

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A smarter relational to Boolean conversion
by Vladimir V. Kisil 06 Jun '21

06 Jun '21

Dear All, I am attaching a small patch. With it the following conversions from relational to Boolean will become "true" from the current "false": realsymbol x("x"); possymbol p("p"); cout << bool(p>0) << endl; cout << bool(abs(x)>=0) << endl; Best wishes, Vladimir -- Vladimir V. Kisil http://www.maths.leeds.ac.uk/~kisilv/ Book: Geometry of Mobius Maps https://doi.org/10.1142/p835 Soft: Geometry of cycles http://moebinv.sourceforge.net/ Jupyter notebooks: https://github.com/vvkisil/MoebInv-notebooks

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