Null space of a matrix
null(a) null(a, 'r') % No equivalent % No equivalent
kernel(a) // No equivalent kernel(a, tolerance) kernel(a, tolerance, "qr")
a = [1 3 2; 2 -3 -5]; null(a) size(null(a),2)
a = [1 3 2; 2 -3 -5]; kernel(a) size(kernel(a),2) // Nullity of a