determinantDD static method
Computes the determinant of the 2x2 matrix with the given entries.
@param x1 a matrix entry @param y1 a matrix entry @param x2 a matrix entry @param y2 a matrix entry @return the determinant of the matrix of values
Implementation
static DD determinantDD(DD x1, DD y1, DD x2, DD y2) {
DD det = x1.multiplyDD(y2).selfSubtractDD(y1.multiplyDD(x2));
return det;
}