JSCLVector product(int product[][], JSCLVector vector) {
JSCLVector v = (JSCLVector) newinstance();
for (int i = 0; i < n; i++) v.element[i] = JSCLInteger.valueOf(0);
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
Generic a = element[i].multiply(vector.element[j]);
int k = Math.abs(product[i][j]) - 1;
v.element[k] = v.element[k].add(product[i][j] < 0 ? a.negate() : a);
}
}
return v;
}
JSCLVector differential(int product[][], Variable variable[]) {
JSCLVector v = (JSCLVector) newinstance();
for (int i = 0; i < n; i++) v.element[i] = JSCLInteger.valueOf(0);
int l = Clifford.log2e(n);
for (int i = 1; i <= l; i++) {
for (int j = 0; j < n; j++) {
Generic a = element[j].derivative(variable[i - 1]);
int k = Math.abs(product[i][j]) - 1;
v.element[k] = v.element[k].add(product[i][j] < 0 ? a.negate() : a);
}
}
return v;
}