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## psb_cdins -- Communication descriptor insert routine
Keywords: userhtml

    call psb_cdins(nz, ia, ja, desc_a, info)

This subroutine examines the edges of the graph associated with the discretization mesh (and isomorphic to the sparsity pattern of a linear system coefficient matrix), storing them as necessary into the communication descriptor.

Type:
  Asynchronous.
On Entry
nz
  the number of points being inserted.
  Scope: local.
  Type: required.
  Intent: in.
  Specified as: an integer value.
ia
  the indices of the starting vertex of the edges being inserted.
  Scope: local.
  Type: required.
  Intent: in.
  Specified as: an integer array of length .
ja
  the indices of the end vertex of the edges being inserted.
  Scope: local.
  Type: required.
  Intent: in.
  Specified as: an integer array of length .

On Return
desc_a
  the updated communication descriptor.
  Scope:local.
  Type:required.
  Intent: inout.
  Specified as: a structured data of type descdata`psb_desc_type`.
info
  Error code.
  Scope: local
  Type: required
  Intent: out.
  An integer value; 0 means no error has been detected.

Notes

1. This routine may only be called if the descriptor is in the build state;
2. This routine automatically ignores edges that do not insist on the current process, i.e. edges for which neither the starting nor the end vertex belong to the current process.

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