From: Tom Prince <tom.prince@ualberta.net>
To: Michael Shulman <mshulman@ucsd.edu>, categories <categories@mta.ca>
Subject: Re: source, sinks, and ?
Date: Fri, 04 Feb 2011 13:48:44 -0500 [thread overview]
Message-ID: <E1PlWhc-0003Hz-Os@mlist.mta.ca> (raw)
In-Reply-To: <E1PZY2H-0000zo-Uf@mlist.mta.ca>
On 2011-01-02, Michael Shulman wrote:
> A family of morphisms { x_i --> y }_{i \in I} in some category, all
> with the same codomain, is called a "sink" or a "cocone". A family {
> x --> y_j }_{j \in J} all with the same domain is called a "source" or
> a "cone". Is there a name for a family of the form { x_i --> y_j }_{i
> \in I, j \in J} ? A cylinder? Or a frustrum (since I \neq J)?
>
> Mike
A join?
Tom
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next prev parent reply other threads:[~2011-02-04 18:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-02 23:26 Michael Shulman
2011-01-03 22:40 ` burroni
2011-01-04 8:41 ` JeanBenabou
2011-02-04 18:48 ` Tom Prince [this message]
2011-01-03 0:40 Fred E.J. Linton
2011-01-04 10:44 Reinhard Boerger
2011-01-04 18:31 ` Michael Shulman
2011-01-05 4:30 ` JeanBenabou
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