György Hajós

György Hajós (February 21, 1912, Budapest – March 17, 1972, Budapest) was a Hungarian mathematician who worked in group theory, graph theory, and geometry. Provided by Wikipedia
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Hungarian problem book III : based on the Eotvos Competition, 1929-1943 [E-Book] /
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Hungarian problem book II : based on the Eotvos Competition, 1929-1943 [E-Book] /
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Hungarian problem book I : based on the Eotvos Competitions, 1894-1905 [E-Book] /