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Oliver Sander
authored
Previously, the number of multigrid transfer operators was always equal to the number of grid levels minus one. That worked out correctly when doing first-order FE spaces. However, for higher-order spaces, the up-most transfer operator transfers from the higher-order space to a first-order space _on the same grid level_. But since the total number of transfer operators was grid levels minus one, this implied that the coarsest grid leve was never used, and the coarse grid solver would operate on the second-coarsest grid. This patch adds the extra transfer operator in this case. That means we now call the coarse grid solver on smaller problems, which makes a noticeable run-time difference. [[Imported from SVN: r9964]]
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