N Ghani writes:

For some rather obscure reason, I'd like to read about braided monoidal categories and, in particular, their associated coherence problems. Can someone provide me with a reference or two please?

Yours,

Neil

Here are a few quickly selected reference that may be helpful. Gerald Dunn - Lax Operad Actions and Coherence for Monoidal n-Categories, A_{\infty} Rings and Modules http://tac.mta.ca/tac/volumes/1997/n4/n4.pdf David N Yetter - FUNCTORIAL KNOT THEORY: Categories of Tangles, Coherence, Categorical Deformations, and Topological Invariants World Scientific, April 2001, 236pp. ISBN 981-02-4443-6 Richard Blute - Braids in Linear Logic http://www.cis.upenn.edu/~bcpierce/types/archives/1992/msg00068.html [good references] Index to John Baez's " This Week's Find's in Mathematical Physics" search for "braided monoidal" http://obswww.unige.ch/~lbartho/TWF/wgindex.html Paul-Andre Mellies - MacLane's coherence theorem viewed as a word problem. http://www.pps.jussieu.fr/~mellies/coherence.ps.gz -- Bob -- Robert L. Knighten 15580 S.W. Bridle Hills Drive Beaverton, OR 97007 (503) 626-4965 Robert@Knighten.org 23-Sep-2002 18:12:58 -0300,1750;000000000000-00000000