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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.
KeywordsResearch Problem Current Research Problem
- 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