## Version 1.1.0

3rd December 2009

Recent Changes

This subroutine estimates the 1-norm ($$\max _ j \sum _{ i=1} ^ n | a _{ij}|$$) of an $$n \times n$$ complex matrix $$\mathbf{ A}$$ given the ability to multiply a vector by both the matrix and its conjugate transpose. Because the explicit form of $$\mathbf{ A}$$ is not required, the subroutine can be used for estimating the norm of matrix functions such as the inverse. Additionally this subroutine is potentially useful for estimating condition numbers of a matrix when the matrix is sparse or not available explicitly.