Abstract
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.
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References
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Hajnal, A., Turán, P. & Juhász, I. Research problems. Period Math Hung 6, 373–374 (1975). https://doi.org/10.1007/BF02017934
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DOI: https://doi.org/10.1007/BF02017934