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RNBQKBNR                 $B9a7K6d6b6L6b6d7K9a(J   mhiroshi@tansei.cc.u-tokyo.ac.jp



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Dear ,
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Thank you for your letter concerning the above title.

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Yours sincerely,
HARCOURT BRACE JOVANOVICH LTD

Joan Wilkinson
Subscriptions Dept.

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---------------- $B0zMQ3+;O(J(Volume13, Number 6, June 1992 $B$NI=;f$NN"(J) ------------

		Editor
Bruno Buchberger        Johannes Kepler Universita:t, Institute fu:r Mathematik,
			A-4040 Linz, Austria

		Associate Editors
Wolfgang Bibel		Technische Hochschule Darmstadt, Darmstadt, FRG
John Cannon 		University of Sydney, Sydney, Australia
Bob Caviness 		University of Delaware, Newark, Delaware, USA
James Davenport 	University of Bath, Bath, England
Kazuhiro Fuchi 		ICOT, Tokyo Japan
Gerard Huet 		IBM T.J.Watson Research Center, Yorktown Heights, New
			York, USA
Zohar Manna 		Stanford University, Stanford, California, USA
Ju:rg Nievergelt 	ETH Informatik, CH-8092,Zurich,Switzerland
David Yun 		Southern Methodist University, Dallas, Texas, USA

		Application Section Editor
Malcolm MacCallum 	School of Mathematical Sciences,Queen Mary and Westfield
			College,Mile End Road,London E1 4NS,UK

		Systems Section Editor
Michael Monagan 	Dept of Computer Science, ETH-Zentrum,
			CH-8092, Zurich, Switzerland

		Editorial Board
A.Aggarwal(USA)        E.Kaltofen(USA)             L.Robbiano(Italy)
A.Biermann(USA)        C.Kirchner(France)          J.A.Robinson(USA)
I.Bolc(Poland)         J-L.Lassez(France)          R.Sidel(USA)
R.Book(USA)            W.Lassner(GDR)              M.Sharir(USA)
H.Coelho(Portugal)     D.Lazard(France)            C.Sims(USA)
G.Collins(USA)         C.Leedham-Green(England)    M.F.Singer(USA)
H.Comon(France)        A.Lenstra(USA)              D.Stoutemyer(USA)
R.Constable(USA)       M.Mignotte(France)          M.Sweedler(USA)
J.Dixon(Canada)        G.Mints(USSR)               B.Trager(USA)
I.Elishakoff(USA)      A.Miola(Italy)              Ja.van Hulzen
E.Engeler(Switzerland) D.Musser(USA)               (The Netherlands)
R.Fateman(USA)         I.Nemeti(Hungary)           V.Weispfenning(FRG)
J.Gallier(USA)         M.Newman(Australia)         E.Welzl(FRG)
V.Gerdt(USSR)          T.Ottman(FRG)               W.Wen-Tsu:n Wu(China)
E.Goto(Japan)          M.Overmars(The Netherlands) C.Yap(USA)
L.Guibas(USA)          R.Pavelle(USA)              H.G.Zimmer(FRG)
C.Hoffman(USA)         M.Pohst(FRG)                R.Zippel(USA)
J.Hsiang(USA)
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