Subject: categories: preprint available (Kock and Reyes)

From: kock <[email-masked]>
Date: Wed, 18 Nov 1998 13:27:09 +0100

The following preprint

A. Kock and G.E. Reyes: Fractional Exponent Functors and Categories of
Differential Equations

is available via the Home Page

http://www.mi.aau.dk/~kock/

or directly by ftp (200 KB)

ftp://ftp.imf.au.dk/pub/kock/ODE5.ps

(also available in .dvi format, 100 KB).

Abstract: This paper grew out of a question/suggestion of Lawvere: to use
the "amazing right adjoints" (= fractional exponents) of Synthetic
Differential Geometry, to get information on the category of second order
differential equations. As a byproduct of our investigations, we derive
some information about the strength (enrichment) of fractional exponent
functors in general.