From: Christian Bauer <Christian.Bauer@uni-mainz.de>
Date: Thu, 11 May 2000 23:22:20 +0000 (+0000)
Subject: - mentioned "Derivative" function
X-Git-Tag: release_0-6-1~15
X-Git-Url: https://ginac.de/ginac.git/tutorial/ginac.git?a=commitdiff_plain;h=fe48203c63c543f1c975f329d07306da7ad0950d;p=ginac.git

- mentioned "Derivative" function
---

diff --git a/NEWS b/NEWS
index 0489cb5b..04f3e559 100644
--- a/NEWS
+++ b/NEWS
@@ -16,6 +16,8 @@ This file records noteworthy changes.
 * ex::to_rational() provides a way to extend the domain of functions like
   gcd() and divide() that only work on polynomials or rational functions (the
   good old ex::subs() method reverses this process)
+* Calling diff() on a function that has no derivative defined returns the
+  inert derivative function "Derivative".
 * Several new timings in the check target.  Some of them may be rather rude 
   at your machine, feel free to interrupt them.