From: "Fred E.J. Linton" <fejlinton@usa.net>
To: "categories" <categories@mta.ca>
Subject: Re: Stone duality for generalized Boolean algebras
Date: Fri, 21 Jan 2011 17:39:02 -0500 [thread overview]
Message-ID: <E1PgyZg-0004EL-Dr@mlist.mta.ca> (raw)
The Boolean rng counterpart to the Stone duality, identifying
Boolean algebras with the opposite of compact T2 0-dim'l spaces,
exploits the fact that the category of boolean rngs amounts to
the category of *augmented* Boolean algebras (the slice category
BA | 2 of 2-valued boolean homomorphisms from Boolean algebras) --
true because *kernel* gives an equivalence from latter to former --
hence is equivalent to the opposite of *pointed* compact T2 0-dim'l
spaces (and base-point-preserving continuous functions).
While the complement of the base point (in such a pointed space)
may be locally compact, that observation is far from functorial,
so there's not much good any category of locally compact T2 0-dim'l
spaces will do you.
HTH. Cheers, -- Fred
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next reply other threads:[~2011-01-21 22:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-21 22:39 Fred E.J. Linton [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-01-23 15:38 Fred E.J. Linton
2011-01-24 21:15 ` George Janelidze
2011-01-26 0:51 ` Eduardo J. Dubuc
2011-01-26 17:19 ` F. William Lawvere
2011-01-27 2:41 ` Eduardo J. Dubuc
2011-01-22 18:47 Jeff Egger
2011-01-21 13:19 Andrej Bauer
2011-01-21 23:06 ` George Janelidze
2011-01-23 4:06 ` Yoshihiro Maruyama
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