May 2008 - GiNaC-list

Re: [GiNaC-list] advice on a GiNaC based project.
by Bhalchandra Thatte 23 May '08

23 May '08

Hello Alex, Thanks for the script. I will take a look at it soon. At some point the graph theoretic part of my project will involve graph isomorphism, and generating all unlabeled graphs from some classes of graphs, generating random objects from various classes, ... and computing various polynomial invariants. Also, at the moment all I know is C (and some C++), so I will probably go ahead and give a try to C+++GiNaC. But I am definitely interested in looking at your script since there is also another open source project in python (called SAGE - software for algebra and geometry experimentation), and some of what I want to do may be possible in SAGE. Thanks to all of you who responded promptly. Regards, Bhalchandra Thatte Alfréd Rényi Institute of Mathematics Budapest ----- Original Message ---- From: alexander baker <baker.alexander(a)gmail.com> To: GiNaC discussion list <ginac-list(a)ginac.de> Cc: Bhalchandra Thatte <bdthatte(a)yahoo.com> Sent: Friday, May 23, 2008 11:12:35 AM Subject: Re: [GiNaC-list] advice on a GiNaC based project. I agree with Alexei, here is a similar example that I put together some time ago using Python, perhaps a high level script would be a better tool for the job! Enjoy. Alex http://www.alexfb.com/cgi-bin/twiki/view/PtPhysics/Adjacency-Matrix-EigenVe… 2008/5/23 Alexei Sheplyakov <varg(a)theor.jinr.ru>: Hello! On Fri, May 23, 2008 at 12:47:55AM -0700, Bhalchandra Thatte wrote: > I wish to write a few programs that do something like this: > take a graph or a tree > each vertex or edge of the graph has a variable associated with it. > walk on the graph or find certain subgraphs, and compute certain > multivariable polynomials in terms of the variables associated > with vertices or edges. I think boost.graph (for graph manipulations) and GiNaC (for symbolic computation) is a reasonable choice. > later possibly do numerical optimization of the polynomials using > an optimization library. Be forewarned: GiNaC does not provide any kind of numerical optimization. > I thought GiNaC would be ideal for this type of applications because > C++ will give me complete control over the data structures and > the efficiency. I suggest to think twice if you really need a low level programming language (such as C++) at all. Best regards, Alexei -- All science is either physics or stamp collecting. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iQIVAwUBSDaEzyXMWnuYxRVqAQL7XxAAok3ywm5yWWvGwSOI/XMCIE3Y7j23Q9td DH8TEX5hIt1kzASA33iaDsWVkvBPRyWPGTF6AJLOvnyOLX1LHcB0Q8F+ojfKmVIw o2raKOltLYO4oDB8K/edUtfLlUrLv7r688t6qdBBzDmxfbMQ/4/W32hioMvzr9yh isWgXIjBV/FV86D2hVF/q7PvbloulHVyxH3TwINkmyItaygfToaS5OyDJVdBeKbv SJ0gbqEKNkyWZ/4ZIZeJ0ckkOhP/fIDGO04YqVKrLUwy7Q1UZuuti3i92Vosr+Yb m7x7v5yZk0J/3W/S1x+ZOl/1tt8UVacAc9maIlQXM9kH0B8wG7vQCHHNKZ6XzHtN krUxNxw7ciWz4WY0tXg2vzePzMCzVN3nfaWLJ9Fznt3VPPDYuFfWQmsS7zPXXOS9 nHkmM9pSZ4wR8nLDZAmIH36J9QMmImx9d/T91na3tAhKm1/4Q/3uO1SLHahIgCcj dYkA8F1GWR082XlBqnWoISwlJjv1ZqNFsjISllixYk24+MvtODHohDEJnEUsAoWg jdol4XxpZS3UAGa+Cy7xpzC1iOpksEmG/3zQaI9QUI8GXdnXfM1noeAGDnH/JeF8 aEsu5Z6Wva3iZYBFj3SM/mnFqleumt6Jf4YBMDYiohQG5RoQCtQ4k/DjSED1JZiP gx4tfNdbA9A= =HgPN -----END PGP SIGNATURE----- _______________________________________________ GiNaC-list mailing list GiNaC-list(a)ginac.de https://www.cebix.net/mailman/listinfo/ginac-list -- Mobile: 07788 872118 Blog: www.alexfb.com -- All science is either physics or stamp collecting.

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advice on a GiNaC based project.
by Bhalchandra Thatte 23 May '08

23 May '08

Hi Everybody, I have just started using GiNaC (actually yet to be able to compile my first program), and I am also not an expert on C++. So I thought I would ask for a little advice here. I wish to write a few programs that do something like this: take a graph or a tree each vertex or edge of the graph has a variable associated with it. walk on the graph or find certain subgraphs, and compute certain multivariable polynomials in terms of the variables associated with vertices or edges. later possibly do numerical optimization of the polynomials using an optimization library. I thought GiNaC would be ideal for this type of applications because C++ will give me complete control over the data structures and the efficiency. But could someone comment if GiNaC is not the right choice? Thank you, Bhalchandra Thatte Alfréd Rényi Institute of Mathematics Budapest

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where is ginac-config?
by Chris Bouchard 06 May '08

06 May '08

GiNaC list, I've successfully installed GiNaC 1.4.3, config.log attached. Another software package, xloops, built on GiNaC is looking for ginac-config. It's expecting to see it in PREFIX/bin, where PREFIX was established while configuring GiNaC (ie ./configure --prefix=PREFIX). Here's a snip of on-screen indications during attemped configure of xloops ------------------------------------------------- checking for ginac-config... no checking for GiNaC - version >= 1.2.0... no *** The ginac-config script installed by GiNaC could not be found *** If GiNaC was installed in PREFIX, make sure PREFIX/bin is in *** your path, or set the GINACLIB_CONFIG environment variable to the *** full path to ginac-config. configure: error: need to have GiNaC installed -------------------------------------------------- PREFIX/bin is in my path and slocate ginac-config comes up empty. The only ginac file in PREFIX/bin is ginac-excompiler. I'm trying to avoid asking for help with xloops... So, here's my GiNaC question. X-loops was last rev'd 11 yrs ago, is the ginac-config script a thing of GiNaC's past or have I screwed up my install of GiNaC in such a way that ginac-config wasn't created...? Thanks for any help, Chris Bouchard

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Re: [GiNaC-list] where is ginac-config?
by Chris Bouchard 06 May '08

06 May '08

GiNaC list, I've found the last version of GiNaC that generated ginac-config (1.3.7) and using that version has solved my problem. I'm up and running now with the x-loops software and wanted to thank you all for the help you've provided. Sincerely, Chris Bouchard ---- Original message ---- >Date: Thu, 1 May 2008 22:13:16 -0500 (CDT) >From: Chris Bouchard <cbouchrd(a)uiuc.edu> >Subject: [GiNaC-list] where is ginac-config? >To: ginac-list(a)ginac.de > >GiNaC list, > >I've successfully installed GiNaC 1.4.3, config.log attached. > >Another software package, xloops, built on GiNaC is looking for ginac-config. It's expecting to see it in PREFIX/bin, where PREFIX was established while configuring GiNaC (ie ./configure --prefix=PREFIX). > >Here's a snip of on-screen indications during attemped configure of xloops >------------------------------------------------- >checking for ginac-config... no >checking for GiNaC - version >= 1.2.0... no >*** The ginac-config script installed by GiNaC could not be found >*** If GiNaC was installed in PREFIX, make sure PREFIX/bin is in >*** your path, or set the GINACLIB_CONFIG environment variable to the >*** full path to ginac-config. >configure: error: need to have GiNaC installed >-------------------------------------------------- > >PREFIX/bin is in my path and slocate ginac-config comes up empty. The only ginac file in PREFIX/bin is ginac-excompiler. I'm trying to avoid asking for help with xloops... > >So, here's my GiNaC question. X-loops was last rev'd 11 yrs ago, is the ginac-config script a thing of GiNaC's past or have I screwed up my install of GiNaC in such a way that ginac-config wasn't created...? > >Thanks for any help, >Chris Bouchard >________________ >config.gz (13k bytes) >________________ >_______________________________________________ >GiNaC-list mailing list >GiNaC-list(a)ginac.de >https://www.cebix.net/mailman/listinfo/ginac-list

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