Combinatorics · Oct 6, 2026

The Erdős–Gallai cycle-decomposition conjecture

Proves that the edges of every finite simple undirected graph on n vertices can be partitioned into at most CnCn simple cycles and single edges, for an absolute constant C. This resolves the Erdős–Gallai cycle-decomposition conjecture, bounding the number of pieces linearly even for dense graphs.

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