[Xy-pic] Trouble with monomorphisms

Ross Moore ross at ics.mq.edu.au
Sun Jul 31 22:11:35 CEST 2005


Hello Sesquipedalian,

On 31/07/2005, at 11:01 AM, Sesquipedalian Abecedarian wrote:

> The xyguide (p. 8) says to use a space to typeset a monomorphism  
> nicely:
>
> \xymatrix{ A \ar @{>->} @< 2pt> [r] \ar @{ >->} @<-2pt> [r] & B }


This comment is given as part of an "Exercise".

The solution is given on p.14 .


HTH,

     Ross Moore


>
> But on my system (Debian stable tetex), this generates an error:
>
> ! Xy-pic error: illegal <dir>: \dir { >} not defined.
> \xyerror@ ...#2}\fi \errmessage {Xy-pic error: #1}
>                                                   }
> l.1597 ...< 2pt> [r] \ar @{ >->} @<-2pt> [r] & B }
>
> I actually want to typeset a vertical monomorphism, so simply adding
> space to the vertex label doesn't work.
>
> Any ideas?  Thanks in advance.
>
> Xy-pic version 3.7 <1999/02/16>
> Copyright (c) 1991-1998 by Kristoffer H. Rose <krisrose at ens-lyon.fr>
> Xy-pic is free software: see the User's Guide for details.
>
> _______________________________________________
> xy-pic mailing list
> http://tug.org/mailman/listinfo/xy-pic
>

------------------------------------------------------------------------
Ross Moore                                         ross at maths.mq.edu.au
Mathematics Department                             office: E7A-419
Macquarie University                               tel: +61 +2 9850 8955
Sydney, Australia  2109                            fax: +61 +2 9850 8114
------------------------------------------------------------------------




More information about the xy-pic mailing list