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Interface AT.Ac.univie.imp.loeffler.pde.threeD.fd.Restrictor

public interface Restrictor
This interface defines the restrict() method which produces a coarse grid from the next finer grid by restriction.

The Full Multigrid (FMG) algorithm works with grids of different sizes corresponding to different levels through the relation size = 2^level + 1, where size is the number of grid elements in one dimension. Restriction is the process of taking a function whose value is known at the grid elements of a grid at a certain level (the fine grid) and producing the values of the function at the grid elements of a grid at the next coarser level (the coarse grid). The fine grid and the coarse grid are oriented such that their corner elements coincide.

Author:
Gerald Loeffler (Gerald.Loeffler@univie.ac.at)
See Also:
FMG

Method Index

 o restrict(ConstGrid)
restricts a function sampled on a specific grid to the next coarser grid

Methods

 o restrict
 public abstract Grid restrict(ConstGrid grid)
restricts a function sampled on a specific grid to the next coarser grid

Parameters:
grid - the input function sampled on a grid at a certain level (size of grid must be 2^level + 1 where level > 1)
Returns:
the function sampled on a grid at the next coarser (lower) level

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