Set the periodicity for the grid
Set the periodicity for the grid. Default is no periodicity.The argument periodic is an dim-dimensional integer array that contains the periodicity for each dimension. A zero value for a dimension means non-periodic, while a nonzero value means periodic and contains the actual period. For example, periodicity in the first and third dimensions for a 10x11x12 grid is indicated by the array [10,0,12].
NOTE: Some of the solvers in hypre have power-of-two restrictions on the size of the periodic dimensions.
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