Erdős problem 723 · problems.science

If there is a finite projective plane of order $n$ then must $n$ be a prime power?

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FormalConjectures/ErdosProblems/

723.lean

Retained formal statement1 of 5

If there is a finite projective plane of order $n$ then must $n$ be a prime power?

FormalConjectures/ErdosProblems/723.leanErdos723.erdos_7233 linesExact file

1True ↔2  ∀ {P L : Type} (x : Membership P L) (x_1 : Fintype P) (x_2 : Fintype L) (pp : Configuration.ProjectivePlane P L),3    IsPrimePow (Configuration.ProjectivePlane.order P L)

OpenStatement only, no proof

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