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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-09-22 and was most recently seen on 2026-09-22.
András Gyárfás is a Hungarian mathematician who specializes in the study of graph theory. He is famous for two conjectures:Together with Paul Erdős he conjectured what is now called the Erdős–Gyárfás conjecture which states that any graph with minimum degree 3 contains a cycle whose length is a power of two.
He and David Sumner independently formulated the Gyárfás–Sumner conjecture according to which, for every tree T, the T-free graphs are χ-bounded.
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