SLATEC Routines --- POSTG2 ---

*DECK POSTG2
      SUBROUTINE POSTG2 (NPEROD, N, M, A, BB, C, IDIMQ, Q, B, B2, B3, W,
     +   W2, W3, D, TCOS, P)
C***BEGIN PROLOGUE  POSTG2
C***SUBSIDIARY
C***PURPOSE  Subsidiary to POISTG
C***LIBRARY   SLATEC
C***TYPE      SINGLE PRECISION (POSTG2-S)
C***AUTHOR  (UNKNOWN)
C***DESCRIPTION
C
C     Subroutine to solve Poisson's equation on a staggered grid.
C
C***SEE ALSO  POISTG
C***ROUTINES CALLED  COSGEN, S1MERG, TRI3, TRIX
C***REVISION HISTORY  (YYMMDD)
C   801001  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900402  Added TYPE section.  (WRB)
C   920130  Modified to use merge routine S1MERG rather than deleted
C           routine MERGE.  (WRB)
C***END PROLOGUE  POSTG2