 
C***BEGIN PROLOGUE  FFTDOC
C***DATE WRITTEN   780201   (YYMMDD)
C***REVISION DATE  830701   (YYMMDD)
C***CATEGORY NO.  J1
C***KEYWORDS  DOCUMENTATION,FAST FOURIER TRANSFORM,FFT
C***AUTHOR  SWATZTRAUBER, PAUL, (NCAR)
C***PURPOSE  Documentation for FFT package.
C***DESCRIPTION
C
C     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
C                       Version 3  June 1979
C
C          A Package of Fortran Subprograms for The Fast Fourier
C           Transform of Periodic and Other Symmetric Sequences
C                              By
C                       Paul N Swarztrauber
C
C       National Center For Atmospheric Research  Boulder,Colorado 8030
C        which is sponsored by the National Science Foundation
C
C     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
C
C     This package consists of programs which perform Fast Fourier
C     Transforms for both complex and real periodic sequences and
C     certain other symmetric sequences that are listed below.
C
C     1.   RFFTI     Initialize RFFTF and RFFTB
C     2.   RFFTF     Forward transform of a real periodic sequence
C     3.   RFFTB     Backward transform of a real coefficient array
C
C     4.   EZFFTI    Initialize EZFFTF and EZFFTB
C     5.   EZFFTF    A simplified real periodic forward transform
C     6.   EZFFTB    A simplified real periodic backward transform
C
C     7.   SINTI     Initialize SINT
C     8.   SINT      Sine transform of a real odd sequence
C
C     9.   COSTI     Initialize COST
C     10.  COST      Cosine transform of a real even sequence
C
C     11.  SINQI     Initialize SINQF and SINQB
C     12.  SINQF     Forward sine transform with odd wave numbers
C     13.  SINQB     Unnormalized inverse of SINQF
C
C     14.  COSQI     Initialize COSQF and COSQB
C     15.  COSQF     Forward cosine transform with odd wave numbers
C     16.  COSQB     Unnormalized inverse of COSQF
C
C     17.  CFFTI     Initialize CFFTF and CFFTB
C     18.  CFFTF     Forward transform of a complex periodic sequence
C     19.  CFFTB     Unnormalized inverse of CFFTF
C***REFERENCES  (NONE)
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  FFTDOC
 
 
