Browsing Combinatorics and Optimization by Author "Chen, Da"
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Cyclically 5-Connected Graphs
Chen, Da Qi (University of Waterloo, 2016-08-29)Tutte's Four-Flow Conjecture states that every bridgeless, Petersen-free graph admits a nowhere-zero 4-flow. This hard conjecture has been open for over half a century with no significant progress in the first forty years. ...