From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/112 Path: news.gmane.org!not-for-mail From: Michael Barr Newsgroups: gmane.science.mathematics.categories Subject: ticked arrowheads in xy-pic and diagxy Date: Wed, 25 Feb 2009 20:08:48 -0500 (EST) Message-ID: Reply-To: Michael Barr NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Trace: ger.gmane.org 1235633516 18758 80.91.229.12 (26 Feb 2009 07:31:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 26 Feb 2009 07:31:56 +0000 (UTC) To: Categories list Original-X-From: categories@mta.ca Thu Feb 26 08:33:12 2009 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from mailserv.mta.ca ([138.73.1.1]) by lo.gmane.org with esmtp (Exim 4.50) id 1Lcak0-0007ff-5O for gsmc-categories@m.gmane.org; Thu, 26 Feb 2009 08:33:08 +0100 Original-Received: from Majordom by mailserv.mta.ca with local (Exim 4.61) (envelope-from ) id 1Lca2p-0003G3-DV for categories-list@mta.ca; Thu, 26 Feb 2009 02:48:31 -0400 Original-Sender: categories@mta.ca Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:112 Archived-At: A month or two ago, Micah McCurdy wrote to ask me if it was possible to make an arrow with a tick in the middle (that is ----+---->) and I said I didn't know how to do that and suggested he ask Ross Moore. Ross told him that xy-pic didn't have that capacity. Well, Micah discovered that it did. Here are some samples, using diagxy, but that is just a front end to xy-pic. $$\bfig \node a(0,0)[A] \node b(300,400)[B] \arrow/@{>}|-*@{>}/[a`b;f] \efig$$ $$\bfig \ptriangle/>`>`@{>}|-@{|}/[A`B`C;f`g`h] \efig$$ $$\bfig \morphism/@{>}|-@{+}/<700,0>[ABCDE`F;h] \efig$$ $$\bfig \morphism/@{>}|-*@{|}/<700,0>[ABCDE`F;h] \efig$$ As far as I can tell, the * between the - and the @ has no effect. The one limitation is that what goes inside the -@{ } must be a \dir. This is a limitation for me, since I cannot figure out the syntax of \newdir. For this to work, it clearly has to be something that tex can rotate. Michael