int width = 10;
DenseMatrix64F A = RandomMatrices.createRandom(width,width,rand);
DeterminantFromMinor minor = new DeterminantFromMinor(width);
double minorVal = minor.compute(A);
LUDecompositionAlt alg = new LUDecompositionAlt();
alg.decompose(A);
double luVal = alg.computeDeterminant();