From: Jiri Adamek <adamek@iti.cs.tu-bs.de>
To: categories net <categories@mta.ca>
Subject: infinite trees
Date: Fri, 14 Dec 2001 12:29:49 +0100 (MET) [thread overview]
Message-ID: <Pine.GSO.3.96.1011214121352.9736D-100000@lisa> (raw)
What is actually a first reference for the fact that for every polynomial
endofunctor of Set a final coalgebra consists of all properly labelled
(finite and infinite) trees? I suspect the first authors to study this
were Arbib and Manes in their
"Parametrized data types do not need...", Information and control 52
(1982), 139-158.
However, it is obvious from that paper that Arbib and Manes were
definitely unaware of the general statement, which explains why they only
mention some special cases in their book in 1986.
Jiri Adamek
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reply other threads:[~2001-12-14 11:29 UTC|newest]
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