Re: Alpha Now, Omega Later

Post   : Alpha Now, Omega Later : 5
URL    : http://inquiryintoinquiry.com/2013/12/04/alpha-now-omega-later-5/
Posted : December 4, 2013 at 6:12 pm
Author : Jon Awbrey

Re: Isomorphism Is Where It's At • “Are there more good cases of isomorphism to study?”
At: http://rjlipton.wordpress.com/2013/12/03/isomorphism-is-where-its-at/

Just off the top of my head, as Data says, there are two examples that come to mind.

Sign Relations.  In computational settings, a sign relation L is a triadic relation of the
form L ⊆ O×S×I, where O is a set of formal objects under consideration and S and I are two
formal languages used to denote those objects.  It is common practice to cut one's teeth on
the special case S = I before moving on to more solid diets.

Cactus Graphs.  In particular, a variant of cactus graphs known (by me, anyway)
as “painted and rooted cacti” (PARCs) affords us with a very efficient graphical
syntax for propositional calculus.

I’ll post a few links in the next couple of comments.

-- 

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