On Jan 3, 2009, at 2:22 AM, William Stein wrote:
> > Hi, > > REDUCE is now open source: http://reduce-algebra.com/ > Is there anything in there worth using for Sage? > It looks like it has some nice facilities for differential equations, both ODEs and PDEs. Not necessarily solutions, but for working with them and investigating them. For instance, for my purposes: crack - CRACK is a package for solving overdetermined systems of partial or ordinary differential equations (PDEs, ODEs). Examples of programs which make use of CRACK for investigating ODEs (finding symmetries, first integrals, an equivalent Lagrangian or a "differential factorization") are included. conlaw - This package presents three different approaches for the determination of conservation laws of differential equations. A paper describing these approaches is also available. fide - This package uses computer algebra to automate the process of numerically solving systems of partial differential equations (PDES). For PDE solving, the finite difference method is applied. (Note: the documentation for this package is in text format.) I thought of making something like fide, but many other things have got in the way. The crack package seems to be quite interesting too. I'm quite certain that there are a lot of useful things in there. Cheers, Tim. --- Tim Lahey PhD Candidate, Systems Design Engineering University of Waterloo http://www.linkedin.com/in/timlahey --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
