If you look in base/linalg/matmul.jl, you'll find functions like generic_matmatmul that do multiplication on arbitrary matrices. Division/factorization is a completely different story, I think. You could presumably implement a gaussian-elimination algorithm (or something fancier) in pure Julia, and that would give you the ability to work with Rational matrices.
--Tim On Wednesday, January 08, 2014 11:50:01 AM David Zhang wrote: > Does Julia have any support for linear algebra on rational-valued matrices? > Currently, most linear algebra functionality seems to be provided by > BLAS/LAPACK, which only support operations on floating-point matrices. > > I am interested in this because I would like to use Julia to derive > high-order numerical integration methods, whose coefficients are the > solutions of rational linear system. > > (Continuation from > http://stackoverflow.com/questions/20985783/rational-matrix-division-in-juli > a )
