Differentation in Ada?

From: Bill Ward (bill_Ward_at_realitycoder.com)
Date: 01/22/04 

Date: Thu, 22 Jan 2004 17:52:43 GMT

  I can't seem to find much on this but I would like to make a function
that has to utilize differentation. Is there a library around that would
help me to do this or do I need to do the differentation manually?