The role of chemistry in fuzzy logic

Hadas Zies (
Thu, 14 Aug 1997 12:08:29 +0200 (MET DST)

To: Bisc Group
From: L. A. Zadeh

Professor P. G. Mezey, Director of the Mathematical Chemistry Research Group at
the University of Saskatchewan and the Editor of the Journal of Mathematical
Chemistry has sent to me a copy of a recent paper of his which is clearly a very
significant application of fuzzy set theory to chemistry.

In an accompanying letter, he writes:

I am a great admirer of spectacular successes of fuzzy set theory and I
enclose a copy of a paper on a particular area of chemical applications.

I am both a chemist and a mathematician (the Editor of the Journal of
Mathematical Chemistry), and I find fuzzy set methods especially suitable to
describe molecules (fuzzy electron density clouds) which are subject to the
Heisenberg uncertainty principle of quantum mechanics, a fundamental relation
with inherent fuzziness.

I really hope that I shall have a chance to meet you; I think that the
entire underlying theory of molecules, chemical reactions and in fact,
chemistry, should be reformulated in terms of fuzzy set theory.

It would be wonderful if one day I could try to convince you that among
natural sciences it is chemistry that is perhaps the most "ripe" for a
systematic fuzzy set representation.

Sincerely yours,

P.G. Mezey, Director
Mathematical Chemistry Research Unit
Prof. Dept of Chemistry
& Dept. of Mathematics

Department of Chemistry, University of Saskatchewan
110 Science Place, Saskatoon, SK S7N 5C9, Canada Telephone:(306)966-4654


I believe that it is important for the fuzzy logic community to be aware of
Professor Mezey's work. I should also like to bring to your attention a recent
book "Fuzzy Logic in Chemistry," (Academic Press), edited by Professor D.
Rouvray of the University of Georgia.

Warm regards to all,

Lotfi A. Zadeh