Kourovka Problem 21.24: Finite-group cograph power graphs are chordal

Every power graph of a finite group that is a cograph is chordal; equivalently, an induced four-cycle forces an induced four-vertex path.

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Every power graph of a finite group that is a cograph is chordal; equivalently, an induced four-cycle forces an induced four-vertex path.

Why it matters

The proof settles the finite-group power-graph implication.

What counts as progress

A specific group theory result with documented AI mathematical work, a stated prior baseline and a checkable source.

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