On chromatic number of graphs and set-systems

  • P. Erdős
  • A. Hajnal
Article

DOI: 10.1007/BF02020444

Cite this article as:
Erdős, P. & Hajnal, A. Acta Mathematica Academiae Scientiarum Hungaricae (1966) 17: 61. doi:10.1007/BF02020444

Copyright information

© Akadémiai Kiadó 1966

Authors and Affiliations

  • P. Erdős
    • 1
  • A. Hajnal
    • 1
  1. 1.Budapest

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