// System.out.println("invert LU-Alt = "+ invertLU_alt(mat,numTrials));
System.out.println("invert Cholesky Inner = "+ invertCholesky(
new LinearSolverChol(new CholeskyDecompositionInner( true)),
mat,numTrials));
System.out.println("invert Cholesky Block Dense = "+ invertCholesky(
new LinearSolverChol(new CholeskyDecompositionBlock( EjmlParameters.BLOCK_WIDTH_CHOL)),
mat,numTrials));
// System.out.println("invert default = "+ invertCholesky(
// LinearSolverFactory.symmetric(mat.numRows),
// mat,numTrials));
// System.out.println("invert CholeskyLDL = "+ invertCholesky(