## Version 1.1.0

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### MC75 Sparse unsymmetric matrix: estimate condition number

This subroutine provides estimates of the classical condition number, ${||A||}_{\infty }{||{A}^{-1}||}_{\infty }$, and Skeel’s condition number, $|||{A}^{-1}||A||{|}_{\infty }$, of an $n×n$ sparse matrix $A$. We denote by $|A|$ and $|{A}^{-1}|$ the matrices whose entries are the absolute values of the entries in $A$ and ${A}^{-1}$.