}
public void testLowerDenseCholesky() {
int n = L.numRows();
DenseCholesky c = new DenseCholesky(n, false);
c.factor(L.copy());
assert I != null;
c.solve(I);
Matrix J = I.mult(L, new DenseMatrix(n, n));
for (int i = 0; i < n; ++i)
for (int j = 0; j < n; ++j)
if (i != j)