theorem
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term proof
complexityClassCount
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39theorem complexityClassCount : Fintype.card ComplexityClass = 5 := by decide
proof body
Term-mode proof.
40
41/-- P ⊆ NP (structural). -/
42-- Note: proving P ≠ NP requires Clay-level work, not doable here.
43-- We just formalise the structural 5-class taxonomy.
44