Journal of Combinatorial Theory, Series B, Volume 70

Volume 70, Number 1, May 1997

• Special Issue Dedicated to W. T. Tutte. 1
  
• Neil Robertson, Daniel P. Sanders, Paul D. Seymour, Robin Thomas:
  The Four-Colour Theorem. 2-44
  
• László Lovász:
  The Membership Problem in Jump Systems. 45-66
  
• Carsten Thomassen:
  Color-Critical Graphs on a Fixed Surface. 67-100
  
• James F. Geelen:
  A Generalization of Tutte's Characterization of Totally Unimodular Matrices. 101-117
  
• David B. Massey, Rodica Simion, Richard P. Stanley, Dirk L. Vertigan, Dominic J. A. Welsh, Günter M. Ziegler:
  Lê Numbers of Arrangements and Matroid Identities. 118-133
  
• Maurits de Graaf, Alexander Schrijver:
  Making Curves Minimally Crossing by Reidemeister Moves. 134-156
  
• Maurits de Graaf, Alexander Schrijver:
  Decomposition of Graphs on Surfaces. 157-165
  
• Neil Robertson, Paul D. Seymour, Robin Thomas:
  Tutte's Edge-Colouring Conjecture. 166-183
  
• Paul D. Seymour:
  Two Chromatic Polynomial Conjectures. 184-196
  
• Noga Alon, Michael Tarsi:
  A Note on Graph Colorings and Graph Polynomials. 197-201
  
• Talmage James Reid, Haidong Wu:
  A Longest Cycle Version of Tutte's Wheels Theorem. 202-215
  

Volume 70, Number 2, July 1997

• Zdenek Ryjácek:
  On a Closure Concept in Claw-Free Graphs. 217-224
  
• Gena Hahn, François Laviolette, Jozef Sirán:
  Edge-Ends in Countable Graphs. 225-244
  
• Bing Zhou:
  Some Theorems Concerning the Star Chromatic Number of a Graph. 245-258
  
• J. Arias de Reyna:
  Finite Fields and Ramanujan Graphs. 259-264
  
• Serge Lawrencenko, Seiya Negami:
  Irreducible Triangulations of the Klein Bottle. 265-291
  
• Atsuhiro Nakamoto, Katsuhiro Ota:
  Diagonal Transformations of Graphs and Dehn Twists of Surfaces. 292-300
  
• Péter Komjáth:
  Two Remarks on the Coloring Number. 301-305
  
• Carsten Thomassen:
  A Simpler Proof of the Excluded Minor Theorem for Higher Surfaces. 306-311
  
• Stéphanie Conilh:
  Note on Kocay's 3-Hypergraphs and Stockmeyer's Tournaments. 312-316
  
• André E. Kézdy, Hunter S. Snevily:
  On Extensions of a Conjecture of Gallai. 317-324
  
• Thomas Zaslavsky:
  The Largest Parity Demigenus of a Simple Graph. 325-345
  
• Artur Andrzejak:
  Splitting Formulas for Tutte Polynomials. 346-366
  
• Jean-François Saclé, Mariusz Wozniak:
  The Erdös-Sós Conjecture for Graphs withoutC₄. 367-372