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From: "Fred E.J. Linton" <fejlinton@usa.net>
To: Categories list <categories@mta.ca>
Cc: Vaughan Pratt <pratt@cs.stanford.edu>
Subject: Re: potential names
Date: Tue, 05 Oct 2010 18:18:17 -0400	[thread overview]
Message-ID: <E1P3Syy-0000Jz-4F@mlist.mta.ca> (raw)

Following up on Paul Taylor's suggestion to " ... play around with skeletons,

bones or even the Grim Reaper ... ", Vaughan Pratt <pratt@cs.stanford.edu> 
offered:

> ... how about "scythe" for the functor [-,1+1]: C^op -->
> C?  In a Boolean topos this is just the (internal) contravariant power
> object functor, but more generally it tends to cleave objects into their
> connected components in a suitable sense.

But "scythe"? A scythe is for cutting off stalks, wholesale.
(A sickle is for cutting them off ... umm ... retail, perhaps :-) .)

To "cleave" an object in two one might utilize a *cleaver*, or, more 
bluntly, a *wedge* -- but the resulting two parts are probably *not*
in most instances "connected" at all, let alone "connected components":
rather, they merely provide a binary coproduct decomposition
of the given object.

Cheers, -- Fred



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             reply	other threads:[~2010-10-05 22:18 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-05 22:18 Fred E.J. Linton [this message]
  -- strict thread matches above, loose matches on Subject: below --
2010-09-27  9:15 EVIL terminology Juergen Koslowski
     [not found] ` <E1P0kdv-00045H-OQ@mlist.mta.ca>
2010-09-29  4:45   ` potential names Martin Escardo
2010-10-01 14:40   ` Todd Trimble
2010-10-02 17:43     ` Paul Taylor
2010-10-04  7:20       ` Vaughan Pratt
2010-10-03 14:27   ` Todd Trimble

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