python3-spexpy - 1:7.8.3+dfsg-2 main

SPEX Left LU is a software package designed to exactly solve unsymmetric sparse
linear systems, Ax = b, where A, b and x contain rational numbers. This
package performs a left-looking, roundoff-error-free (REF) LU factorization
PAQ = LDU, where L and U are integer, D is diagonal, and P and Q are row and
column permutations, respectively. Note that the matrix D is never explicitly
computed nor needed; thus this package uses only the matrices L and U.