March 2001 - GiNaC-list

failed asertion
by Ben Sapp 29 Mar '01

29 Mar '01

I am trying to use GiNaC in, GNU Octave, an interactive scripting language used primarily for numerical analysis. Below, I provide some output from octave. Can you provide any clues as to what I may be doing to make the following assertion to fail? What can I do to fix it? octave:1> symbols installing ex type at type-id = 18 installing sym type at type-id = 19 installing vpa type at type-id = 20 octave:2> page_screen_output = 0; octave:3> x = sym("x") x = x octave:4> x^2 octave: basic.h:77: GiNaC::basic::~basic(): Assertion `(!(flags & status_flags::dynallocated))||(refcount==0)' failed. -- Ben Sapp Los Alamos National Laboratory email: <mailto:bsapp@lanl.gov> Phone: (505)667-3277 Fax: (505)665-7920 URL: http://www.neutrino.lanl.gov/ -- - To UNSUBSCRIBE, email to ginac-list(a)ginac.de with a subject of "unsubscribe".

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install on linux with rpm
by richard noel fell 29 Mar '01

29 Mar '01

I am using redhat 7.0. Here is the result of attempting to install ginac via the rpm: [root@rosewall rfell]# rpm -ivh GiNaC-0.7.3-1.i386.rpm GiNaC ################################################## /sbin/ldconfig: /lib/gnulibc1/libiberty.so.1.0 is not a shared object file (Type: 1). [root@rosewall rfell]# What does this error message mean? (I assume it is an error message since ginac is not installed.) Thanks, Dick Fell - To UNSUBSCRIBE, email to ginac-list(a)ginac.de with a subject of "unsubscribe".

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nonlinear equation systems
by Tilman Utz 28 Mar '01

28 Mar '01

Hello all, possibliy I just missed that one: Is there a method to solve nonlinear systems in Ginac? thanks Tilman - To UNSUBSCRIBE, email to ginac-list(a)ginac.de with a subject of "unsubscribe".

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For the brave and adventurous...
by Richard B. Kreckel 24 Mar '01

24 Mar '01

...there is some great new compiler food! It's called GiNaC-0.8.0, it is completely fat- and cholesterol-free and available at every good grocery shop next to you. For the not so brave and adventurous, Debian and RedHat pre-cooked servings are expected to follow next week (well maybe). Here is the summary from the NEWS file: * Complete revamp of indexed objects. Instead of multiple classes for indexed things and their indices there is now only one "indexed" class and two types of indices: "idx" for simple indices and "varidx" for indices with variance. There are predefined delta, epsilon and metric tensors, and a function simplify_indexed() that performs canonicalization and dummy index summations. Matrix objects can be indexed for doing simple linear algebra. * Added an option "expand_indexed" to expand() to perform expansion of indexed objects like (a+b).i -> a.i + b.i * Renamed get_indices() to get_free_indices(), which no longer returns dummy indices and checks the consistency of indices in sums. * sqrfree() factorization fixed and improved syntactically. * subs() works on matrices. * Matrices can be constructed from flat list of elements; diagonal matrices can be constructed from list of diagonal elements with diag_matrix(). * Fixed memory leak in expand(). * Operator% for objects of class ncmul has gone. Use operator* now for that case too, which is much more natural. Happy hacking -richy. -- Richard Kreckel <Richard.Kreckel(a)Uni-Mainz.DE> <http://wwwthep.physik.uni-mainz.de/~kreckel/> - To UNSUBSCRIBE, email to ginac-list(a)ginac.de with a subject of "unsubscribe".

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