COMBINATORICA • Volume 23 • Number 4 • 2003
CONTENTS
ETSUKO BANNAI, KAZUKI KAWASAKI, YUSUKE NITAMIZU, TEPPEI SATO:
An upper bound for the cardinality of an s-distance set in Euclidean space 535
BELA BOLLOBAS, IMRE LEADER: Set systems with few disjoint pairs 559
JAMES D. CURRIE, CAMERON W. PIERCE: The fixing block method in combinatorics on words 571
ANDRAS GACS: On a generalization of Redei's theorem 585 W. GAO. Y. O. HAMIDOUNE, A. LLADO, O. SERRA: Covering a finite
abelian group by subset sums 599
MARTIN GROHE: Local tree-width, excluded minors, and approximation algorithms G13 HEIN VAN DER HOLST: TWO tree-width-like graph invariants 633 Louis KAUFFMAN, ROBIN THOMAS: Temperley-Lieb algebras and the four-
color theorem 653 HANNO LEFMANN: On heilbronn's problem in higher dimension 669
ZHI-WEI SUN: On the function w(x) — |{1 < s < k : x = as (mod ns)}\ .. 681
"NOTE
STEPHAN BRANDT: On the structure of graphs with bounded clique number 693