From: "Fred E.J. Linton" <fejlinton@usa.net>
To: <categories@mta.ca>
Subject: Re: Linear--structure or property?
Date: Sun, 03 Sep 2006 23:11:18 -0400 [thread overview]
Message-ID: <561kiDDks0898S14.1157339478@cmsweb14.cms.usa.net> (raw)
David Ellerman begins,
> When a Boolean algebra B is treated as a Boolean ring in the usual ...
Boolean algebras actually have the additional surprise that,
because their multiplication (meet) is idempotent (as well as
commutative and associative), it distributes over itself
( a(bc) = (ab)(ac) ) so that one can use multiplication as
a third addition candidate (the first two having been the
more usual symmetric difference and join, of course).
Cheers, and Happy Labor Day (in the US, anyway),
-- Fred
next reply other threads:[~2006-09-04 3:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-04 3:11 Fred E.J. Linton [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-09-04 4:14 Fred E.J. Linton
2006-09-03 18:32 David Ellerman
2006-09-03 9:26 Fred E.J. Linton
2006-08-12 16:35 F W Lawvere
2006-08-11 21:47 George Janelidze
2006-08-11 14:53 George Janelidze
2006-08-11 10:49 Stephen Lack
2006-08-11 14:35 ` F W Lawvere
2006-08-11 9:12 George Janelidze
2006-08-10 20:14 Michael Barr
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