[Lapackpp-devel] Re: lapackpp question

[Christian S. <sti...@tu...>]

Dear Neil,

NEIL ANTHONY KLINGENSMITH schrieb:
> I understand that you are an active participant in the development of
> the lapackpp package, and I'd just like to know if it provides
> functionality for inverting square matricies.  I was unable to find any
> information about that in the documentation, but it seems such an
> essential operation that I can't believe it would be left out.

The functionality of inverting a matrix is included. However, with some 
background in numerics you will surely have heard that inverting a 
matrix should not be calculated explicitly; rather, at the point where 
an inverted matrix is used, a linear equation system has to be solved 
instead. Also, if you solve a linear equation system with an identity 
matrix as the right hand side your result will be the inverted matrix.

The interesting question rather is: are you looking for general 
real-valued matrices or anything more special (symmetric, sparse, 
complex-valued)?

Anyway, inverting a matrix means solving a system of linear equations, 
and this is supported for all matrices in Lapack++.

Christian Stimming