function C = GAminus(M,N)%GAminus(M,N): subtract two multivectors.%%See also gable.% GABLE, Copyright (c) 1999, University of Amsterdam% Copying, use and development for non-commercial purposes permitted.%          All rights for commercial use reserved; for more information%          contact Leo Dorst (leo@wins.uva.nl).%%          This software is unsupported.    C=GA([M-N;0;0;0;0;0;0;0]);