<h1>Results</h1>
This is the expected output:

@code{.cpp}

Initial residual norm sqrt(r^T r):
%%MatrixMarket matrix array real general
1 1
4.3589
Final residual norm sqrt(r^T r):
%%MatrixMarket matrix array real general
1 1
6.31088e-14
Multigrid iteration count:     9
Multigrid generation time [ms]: 3.35361
Multigrid execution time [ms]: 10.048
Multigrid execution time per iteration[ms]: 1.11644

@endcode

<h3> Comments about programming and debugging </h3>
