1Function: algsub 2Section: algebras 3C-Name: algsub 4Prototype: GGG 5Help: algsub(al,x,y): element x-y in al. 6Doc: Given two elements $x$ and $y$ in \var{al}, computes their difference 7 $x-y$ in the algebra \var{al}. 8 \bprog 9 ? A = alginit(nfinit(y), [-1,-1]); 10 ? algsub(A,[1,1,0,0]~,[1,0,1,0]~) 11 %2 = [0, 1, -1, 0]~ 12 @eprog 13 14 Also accepts matrices with coefficients in \var{al}. 15