## Version 1.0.0

Permutes a sparse real or complex matrix to a block lower triangular form, i.e. given a sparse matrix $A={\left\{{a}_{ij}\right\}}_{n×n}$, it attempts to ﬁnd permutation matrices $P$ and $Q$ such that $Â=PAQ$ is block lower triangular and it returns $Â$ to the caller.