// This is how you declare a finite field of 2 elements
// = F_2 = Z (mod 2) = 0, 1
// ring r = 2, x, lp;
// This is how you declare a finite field of 2^K elements
ring r = (2, A), x, lp;
//You have to specify the irreducible polynomial
// also called the minimal polynomial
minpoly = A^4 + A^3 + 1;
// The above is a minpoly of degree K = 4
// So GF(2^4) = GF(2^4) = GF(16)