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Bouchet's 6-flow conjecture ★★★
Author(s): Bouchet
Conjecture Every bidirected graph with a nowhere-zero
-flow for some
, has a nowhere-zero
-flow.



Keywords: bidirected graph; nowhere-zero flow
Jaeger's modular orientation conjecture ★★★
Author(s): Jaeger
Keywords: nowhere-zero flow; orientation
5-flow conjecture ★★★★
Author(s): Tutte
Conjecture Every bridgeless graph has a nowhere-zero 5-flow.
Keywords: cubic; nowhere-zero flow