From: Richard Kreckel <kreckel@ginac.de>
Date: Tue, 24 Nov 2015 12:09:47 +0000 (+0100)
Subject: Tutorial: how to create noncommutative symbols?
X-Git-Tag: ginac_1-6-6~5
X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=commitdiff_plain;h=27213d158e5ec4b606b4f4d0766bf75eeb18673f

Tutorial: how to create noncommutative symbols?

This seems to be frequently asked:
<http://www.ginac.de/pipermail/ginac-devel/2015-November/002213.html>

Cherry-picked from dfaba64c.
---

diff --git a/doc/tutorial/ginac.texi b/doc/tutorial/ginac.texi
index 3db3518e..93ed619f 100644
--- a/doc/tutorial/ginac.texi
+++ b/doc/tutorial/ginac.texi
@@ -3033,6 +3033,8 @@ canonicalize themselves according to rules specified in the implementation
 of the non-commutative classes. The drawback is that to work with other than
 the built-in algebras you have to implement new classes yourself. Both
 symbols and user-defined functions can be specified as being non-commutative.
+For symbols, this is done by subclassing class symbol; for functions,
+by explicitly setting the return type (@pxref{Symbolic functions}).
 
 @cindex @code{return_type()}
 @cindex @code{return_type_tinfo()}