Existence of an abelian group guaranteeing flow reconfiguration connectivity

Let GG be a graph, and let F(G,A)\mathcal{F}(G,A) denote its reconfiguration graph whose vertices are nowhere-zero AA-flows, with adjacency given by changing flow values only on a cycle of GG. An abelian group is a group whose operation is commutative, and a graph is 2-edge-connected if it has no bridge. The abelian-group flow reconfiguration conjecture. There is an abelian group AA such that, for every 2-edge-connected graph GG, the reconfiguration graph

F(G,A)\mathcal{F}(G,A)

is connected. This is a group-flow variant of the integer-flow reconfiguration questions above and remains open.

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Primary source

Louis Esperet, Kevin Hendrey, Aurélie Lagoutte, Margaux Marseloo, Sergey Norin and Raphael Steiner, “Nowhere-zero flow reconfiguration”, arXiv:2512.17342 (2026).

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