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1. en.wikipedia.org › wiki › List_of_unsolved_problems_in_mathematicsList of unsolved problems in mathematics - Wikipedia

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   3 godz. temu · Tutte's conjectures: every bridgeless graph has a nowhere-zero 5-flow [133] every Petersen - minor -free bridgeless graph has a nowhere-zero 4-flow [134] Woodall's conjecture that the minimum number of edges in a dicut of a directed graph is equal to the maximum number of disjoint dijoins.