..
     .. Array Arguments ..
     ..
  Purpose
  =======
  PSLARED2D redistributes a 1D array
  It assumes that the input array, BYROW, is distributed across
  columns and that all process rows contain the same copy of
  BYROW.  The output array, BYALL, will be identical on all processes
  and will contain the entire array.
  Notes
  =====
  Each global data object is described by an associated description
  vector.  This vector stores the information required to establish
  the mapping between an object element and its corresponding process
  and memory location.
  Let A be a generic term for any 2D block cyclicly distributed array.
  Such a global array has an associated description vector DESCA.
  In the following comments, the character _ should be read as
  "of the global array".
  NOTATION        STORED IN      EXPLANATION
  --------------- -------------- --------------------------------------
  DTYPE_A(global) DESCA( DTYPE_ )The descriptor type.  In this case,
                                 DTYPE_A = 1.
  CTXT_A (global) DESCA( CTXT_ ) The BLACS context handle, indicating
                                 the BLACS process grid A is distribu-
                                 ted over. The context itself is glo-
                                 bal, but the handle (the integer
                                 value) may vary.
  M_A    (global) DESCA( M_ )    The number of rows in the global
                                 array A.
  N_A    (global) DESCA( N_ )    The number of columns in the global
                                 array A.
  MB_A   (global) DESCA( MB_ )   The blocking factor used to distribute
                                 the rows of the array.
  NB_A   (global) DESCA( NB_ )   The blocking factor used to distribute
                                 the columns of the array.
  RSRC_A (global) DESCA( RSRC_ ) The process row over which the first
                                 row of the array A is distributed.
  CSRC_A (global) DESCA( CSRC_ ) The process column over which the
                                 first column of the array A is
                                 distributed.
  LLD_A  (local)  DESCA( LLD_ )  The leading dimension of the local
                                 array.  LLD_A >= MAX(1,LOCr(M_A)).
  Let K be the number of rows or columns of a distributed matrix,
  and assume that its process grid has dimension p x q.
  LOCr( K ) denotes the number of elements of K that a process
  would receive if K were distributed over the p processes of its
  process column.
  Similarly, LOCc( K ) denotes the number of elements of K that a
  process would receive if K were distributed over the q processes of
  its process row.
  The values of LOCr() and LOCc() may be determined via a call to the
  ScaLAPACK tool function, NUMROC:
          LOCr( M ) = NUMROC( M, MB_A, MYROW, RSRC_A, NPROW ),
          LOCc( N ) = NUMROC( N, NB_A, MYCOL, CSRC_A, NPCOL ).
  An upper bound for these quantities may be computed by:
          LOCr( M ) <= ceil( ceil(M/MB_A)/NPROW )*MB_A
          LOCc( N ) <= ceil( ceil(N/NB_A)/NPCOL )*NB_A
  Arguments
  =========
    NP = Number of local rows in BYROW()
  N       (global input) INTEGER
          The number of elements to be redistributed.  N >= 0.
  IA      (global input) INTEGER
          IA must be equal to 1
  JA      (global input) INTEGER
          JA must be equal to 1
  DESC    (global/local input) INTEGER Array of dimension DLEN_
          A 2D array descriptor, which describes BYROW
  BYROW   (local input) distributed block cyclic REAL array
          global dimension (N), local dimension (NP)
          BYROW is distributed across the process columns
          All process rows are assumed to contain the same value
  BYALL   (global output) REAL global dimension( N )
          local dimension (N)
          BYALL is exactly duplicated on all processes
          It contains the same values as BYROW, but it is replicated
          across all processes rather than being distributed
          BYALL(i) = BYROW( NUMROC(i,DESC( MB_ ),MYCOL,0,NPCOL ) on the procs
          whose MYCOL == mod((i-1)/DESC( MB_ ),NPCOL)
  WORK    (local workspace) REAL dimension (LWORK)
          Used to hold the buffers sent from one process to another
  LWORK   (local input) INTEGER size of WORK array
          LWORK >= NUMROC(N, DESC( MB_ ), 0, 0, NPROW)
     .. Parameters ..