=================
Possible solution                                                       [TOC]
=================

Code
====
:import: session32/sol02/coarse_grid.cpp [fold]


Compile and run
===============

---- SHELL(path=session32/sol02) -----------------------------------------------
g++ -Wall -I /home/numerik/pub/hpc/ws18/session25/ -std=c++17                +++
    -o coarse_grid coarse_grid.cpp
./coarse_grid > coarse_grid.data
--------------------------------------------------------------------------------


Plot of residuals
=================

---- SHELL(path=session32/sol02, hide) -----------------------------------------
gnuplot coarse_grid0.gnuplot
gnuplot coarse_grid1.gnuplot
gnuplot coarse_grid2.gnuplot
gnuplot coarse_grid3.gnuplot
gnuplot coarse_grid4.gnuplot
--------------------------------------------------------------------------------

Plot of residual for initial guess
----------------------------------

---- IMAGE ----------------------------
session32/sol02/coarse_grid0.svg
---------------------------------------

Plot of residual after one iteration
------------------------------------

---- IMAGE ----------------------------
session32/sol02/coarse_grid1.svg
---------------------------------------

Plot of residual after two iterations
-------------------------------------

---- IMAGE ----------------------------
session32/sol02/coarse_grid2.svg
---------------------------------------

Plot of residual after three iterations
---------------------------------------

---- IMAGE ----------------------------
session32/sol02/coarse_grid3.svg
---------------------------------------

Plot of approximate solution after three iterations
---------------------------------------------------

---- IMAGE ----------------------------
session32/sol02/coarse_grid4.svg
---------------------------------------