Periodica Mathematica Hungarica

, Volume 5, Issue 2, pp 185–185 | Cite as

Research problems

  • A. Hajnal
  • P. Erdős


In this column Periodica Mathematica Hungarica publishes current research problems whose proposers believe them to be within reach of existing methods. Manuscripts should preferably contain the background of the problem and all references known to the author. The length of the manuscript should not exceed two doublespaced type-written pages.


Research Problem Current Research Problem 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. [1]
    V. T. Sós, P. Erdős andW. G. Brown, On the existence of triangulated spheres in 3-graphs, and related problems,Period. Math. Hungar. 3 (1973) 221–228.CrossRefGoogle Scholar
  2. [2]
    V. T. Sós, P. Erdős andW. G. Brown, Some extremal problems on r-graphs,New directions in the theory of graphs, edited by F. Harary, Academic Press, New York-London, 1973, 53–63.Google Scholar

Copyright information

© Akadémiai Kiadó 1974

Authors and Affiliations

  • A. Hajnal
  • P. Erdős

There are no affiliations available

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