October 2003 - GiNaC-devel

Broken link in www.ginac.de
by Roy at SEVENtwentyfour Inc. 30 Oct '03

30 Oct '03

There appears to be a problem on this page of your site. On page http://www.ginac.de/tutorial/tutorial_8.html when you click on "C++-FAQ lite", the link to http://www.cerfnet.com/~mpcline/c++-faq-lite/ gives the error: Domain name lookup failed (may be a transient error). As recommended by the Robot Guidelines, this email is to explain our robots activities and to let you know about one of the broken links we encountered. LinkWalker does not store or publish the content of your pages, but rather uses the link information to update our map of the World Wide Web. Are these reports helpful? I'd love some feedback. If you prefer not to receive these occasional error notices please let me know. Roy Bryant ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Roy Bryant, roybryant(a)seventwentyfour.com President SEVENtwentyfour Inc. ("Always watching the Web") http://www.seventwentyfour.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Problem report
by John Fletcher 26 Oct '03

26 Oct '03

Hello I attach a program which compiles and runs and asks to be reported. A copy of that message is as a comment in the code. System: Red Hat 9.0 with gcc 3.2 cln 1.1.5 and GiNaC 1.1.4 installed with no extra options (recently installed). A word about what I am trying to do. I want to use the ex class as a template parameter something<ex> and the class something< > makes use of Boost and deep inside wants to convert GiNaC::ex to double and cannot find a way to do this. I want to provide a default way to satisfy that request EVEN IF IT DOES NOT MAKE SENSE to get under way the use of GiNaC for symbolic calculation inside the template class. This is very much a "first action". The later action includes a more thorough use of GiNaC to replace the Boost library within the template class. I have already done something similar with a different symbolic algebra in C++. Thanks John Fletcher ------------------------------------------------------------------- Dr John P. Fletcher Tel: (44) 121 359 3611 ext 4625 Chemical Engineering and Applied Chemistry (CEAC), School of Engineering and Applied Science (SEAS), Aston University, Fax: (44) 121 359 4094 Aston Triangle, Email: J.P.Fletcher(a)aston.ac.uk BIRMINGHAM B4 7ET U.K. CEAC Web site http://www.ceac.aston.ac.uk/ The following section of this message contains a file attachment prepared for transmission using the Internet MIME message format. If you are using Pegasus Mail, or any other MIME-compliant system, you should be able to save it or view it from within your mailer. If you cannot, please ask your system administrator for assistance. ---- File information ----------- File: test.cpp Date: 23 Oct 2003, 23:56 Size: 539 bytes. Type: Program-source

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Announcing GiNaC 1.1.4
by Richard B. Kreckel 17 Oct '03

17 Oct '03

* It has defied the world's greatest mathematicians. * It lies in wait wherever problems gather. * It is a timeless force with the power to change the course of history. Dear software aficionado, It is our pleasure to introduce GiNaC release 1.1.4. For the true software collecting enthusiast, this is a release like no other -- explaining, illuminating, and illustrating in depth how the bits, bytes and exabytes of the computing machinery more often than not solve problems of undreamed complexity. GiNaC 1.1.4 -- an opus like no other available today -- will bring you to the crossroads of mathematics and computing. Quite simply, GiNaC-1.1.4 is an unparalleled resource no serious software connoisseur can afford to overlook. Take advantage of this singular opportunity and download your very own copy today from URL <ftp://ftpthep.physik.uni-mainz.de/pub/GiNaC>. Best regards -rbk. -- Richard B. Kreckel <Richard.Kreckel(a)GiNaC.DE> <http://www.ginac.de/~kreckel/>

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how to construct a ex in GiNaC
by cbq 17 Oct '03

17 Oct '03

I read the GiNaC code ,found a question. Under GiNaC namespace ,the under code works well. //***this is my code: ............ #include "ginac/ginac.h" using namespace GiNaC; ............ int main(void) { symbol a("a"),b("b"); ex ex0(a+b); cout<<"ex0 = "<<ex0<<endl; return 0; } // end the code but i find nothing about method ex(symbol) in GiNaC. how does the above statement ex ex0(a) work? help me !! thanks! best regards, Boqun Cheng 2003.10.17

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