public void testldltsolve() { int K = thousandconstant; DenseMatrix A_ = rand(K, K); DenseMatrix A = A_.t().mmul(A_); DenseMatrix B = rand(K, K); Timer timer = new Timer(); DenseMatrix X = A.ldltSolve(B); timer.printTimeCheckMilliseconds(); assertTrue(A.mmul(X).equals(B)); }