From: Steve Vickers <s.j.vickers@cs.bham.ac.uk>
To: categories@mta.ca
Subject: Re: Function composition of natural transformations?
Date: Tue, 03 Jun 2003 10:21:49 +0100 [thread overview]
Message-ID: <3EDC68AD.6060702@cs.bham.ac.uk> (raw)
In-Reply-To: <200306021414.QAA18084@d2-hrz.uni-duisburg.de>
Marc Olschok wrote:
>For the above reason \circ is used for the "horizontal composition";
>\cdot or \ast (I do not remember which one) is used for the
>"vertical composition", which after all looks more "point-wise".
>
>Unfortunately some authors use these symbols just the other way round.
>
>Marc
>
It is also possible to use a 2-dimensional syntax, in which horizontal
composition is composed horizontally and vertical composition is
composed vertically. Then algebraic manipulations are a bit like sliding
tiles around in a tray.
Steve Vickers.
next prev parent reply other threads:[~2003-06-03 9:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-02 14:14 Marc Olschok
2003-06-03 9:21 ` Steve Vickers [this message]
2003-06-03 20:32 ` Toby Bartels
2003-06-04 20:53 ` Ronnie Brown
2003-06-05 9:49 ` Tim Porter
2003-06-04 19:44 Jpdonaly
2003-06-04 20:07 Tom LEINSTER
2003-06-09 13:34 ` Ronnie Brown
2003-06-06 21:29 Jpdonaly
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3EDC68AD.6060702@cs.bham.ac.uk \
--to=s.j.vickers@cs.bham.ac.uk \
--cc=categories@mta.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).