Karim BELABAS on Tue, 31 Oct 2000 17:49:07 +0100 (MET) |
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Re: Linear equations under gp |
[Leonhard Moehring:] > I'd like to know, if a pari user has tried to > solve fairly large linear equations under pari/gp. > > While i know that there are other packages that > specialize in linear equations, ofc it would be > a lot more convenient to solve matrices under gp, > where the matrix coefficients are calculated. > I've tried to work as space efficient as possible > (e.g. doing matrix operations in place), > but the best i could get to work was a 1500x1500 > real matrix, with a 28 digit accuracy on a 150 MB stack > (linux), using the pari routine matsolve. > > Now 150M divided by 1.5K squared and take away some > for the overhead is around 60 bytes per coefficient. > That number seemed slightly higher than what I had > expected, so I wondered if anybody out there has some > experiences if I could solve somehow larger matrices > under these circumstances in Pari. First, what version of PARI are you using ?