Re:simple equation system -- crashing M5?

*To*: mathgroup at smc.vnet.net*Subject*: [mg44282] Re:[mg44256] simple equation system -- crashing M5?*From*: Rolf Mertig <rolf at mertig.com>*Date*: Tue, 4 Nov 2003 03:23:54 -0500 (EST)*Reply-to*: rolf at mertig.com*Sender*: owner-wri-mathgroup at wolfram.com

>Has anyone had such an experience?? Any ideas?? I do not know how to use the built-in Solve or related functions to solve your system (though I am sure it is possible somehow). However, one can just implement a modification (using Collect and a modification of Factor for intermediate results) of the "High-School-Algorithm" to solve this type of equations. I have done this some time ago in Solve3.m of FeynCalc (since this type of equations come up frequently in Feynman diagram and integrals calculations). On a decent Linux machine Solve3 gets a result in about 6 minutes. Using Simplify to get a shorter result takes not more than 67 MB. Since the result is somewhat longish (LeafCount is 176202) I put it here: http://www.feyncalc.org/download/examples/solve3.m http://www.feyncalc.org/download/examples/solve3.out Regards, Rolf Mertig --- Mertig Consulting http://www.mertig.com