Erdős problem 633 · problems.science

A triangle whose side lengths and angles are integrally independent is cuttable only into a non-zero square number of congruent triangles. This is proved in [So09c].

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FormalConjectures/ErdosProblems/

633.lean

Retained formal statement8 of 8

Every triangle is simili-cuttable into any number of similar triangles, except 0, 2, 3, 5. This is proved in [So09].

FormalConjectures/ErdosProblems/633.leanErdos633.IsSimiliCuttable.of_ne_zero_two_three_five2 linesExact file

1∀ {n : ℕ} {T : Affine.Triangle ℝ (EuclideanSpace ℝ (Fin 2))},2  n ≠ 0 → n ≠ 2 → n ≠ 3 → n ≠ 5 → Erdos633.IsSimiliCuttable n T

SolvedStatement only, no proof

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