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;;;;;;  All files in this directory or any subdirectories are   ;;;;;;;;
;;;;;;  copyright 1997, 1998, 1999, 2000, 2002, 2003, 2008      ;;;;;;;;
;;;;;;  by Rafael D. Sorkin.  All rights reserved.              ;;;;;;;;
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Version 2.1 Dec  6 2003  (still under construction)
Version 2.0 Nov 28 2002 

Version 1.4  Dec 22 1998 (available here as a tar file)
Version 1.3  Jul 16 1998
Version 1.2  May 10 1998 
Version 1.1  May  9 1998
Version 1.0  Mar  3 1997


Changes in version 2.1  

  Additions to the documentation files here

Changes in version 2.0

  MANY changes and improvements.  Still to be documented.        

Changes in version 1.4

  A few functions have been added, among them:
  `count-relations', `create-order' (macro)

  A few functions have been improved.

  Some names of poset functions have been changed, a la
  `count-chains-of-poset-inayoitwa' --> `count-chains-for'
  
  Some documentation has been added.

Changes in version 1.3

  A few new functions have been added, and some corrections made.
  The file "Some.more.documentation" has been brought more up to date.

Changes in version 1.1

  `posort-upward' and `posort' replaced by much faster versions