SLATEC Routines --- BLKTR1 ---

*DECK BLKTR1
      SUBROUTINE BLKTR1 (N, AN, BN, CN, M, AM, BM, CM, IDIMY, Y, B, W1,
     +   W2, W3, WD, WW, WU, PRDCT, CPRDCT)
C***BEGIN PROLOGUE  BLKTR1
C***SUBSIDIARY
C***PURPOSE  Subsidiary to BLKTRI
C***LIBRARY   SLATEC
C***TYPE      SINGLE PRECISION (BLKTR1-S, CBLKT1-C)
C***AUTHOR  (UNKNOWN)
C***DESCRIPTION
C
C BLKTR1 solves the linear system set up by BLKTRI.
C
C B  contains the roots of all the B polynomials.
C W1,W2,W3,WD,WW,WU  are all working arrays.
C PRDCT  is either PRODP or PROD depending on whether the boundary
C conditions in the M direction are periodic or not.
C CPRDCT is either CPRODP or CPROD which are the complex versions
C of PRODP and PROD. These are called in the event that some
C of the roots of the B sub P polynomial are complex.
C
C***SEE ALSO  BLKTRI
C***ROUTINES CALLED  INDXA, INDXB, INDXC
C***COMMON BLOCKS    CBLKT
C***REVISION HISTORY  (YYMMDD)
C   801001  DATE WRITTEN
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900402  Added TYPE section.  (WRB)
C***END PROLOGUE  BLKTR1