Inverting a non-square matrix

*To*: mathgroup at smc.vnet.net*Subject*: [mg20201] Inverting a non-square matrix*From*: Nicolas Bardou <nicolas.bardou at at.siemens.fr>*Date*: Wed, 6 Oct 1999 21:06:23 -0400*Organization*: Siemens Automotive S.A.*Sender*: owner-wri-mathgroup at wolfram.com

Hi all, I learnt a bit of Mathematica when I was student and I need a formal calculation of the inverse of a non square matrix. But we do not have the software in my department. Can anyone say me if it is possible, and what are the formulas? My matrix is: A = [a b c d] [e f g h] [i j k l] and all the parameters are variable. Thank you by advance!