ISLocalToGlobalMapping

mappings from an arbitrary local ordering from 0 to n-1 to a global PETSc ordering used by a vector or matrix.

Synopsis

struct _p_ISLocalToGlobalMapping{
  PETSCHEADER(int)
  int n;                  /* number of local indices */
  int *indices;           /* global index of each local index */
  int globalstart;        /* first global referenced in indices */
  int globalend;          /* last + 1 global referenced in indices */
  int *globals;           /* local index for each global index between start and end */
};

Note: mapping from Local to Global is scalable; but Global to Local may not be if the range of global values represented locally is very large.

Note: the ISLocalToGlobalMapping is actually a private object; it is included here for the MACRO ISLocalToGlobalMappingApply() to allow it to be inlined since it is used so often.

ISLocalToGlobalMapping

Synopsis

See Also