theorem proved term proof

`mobius_twelve`

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formal statement (Lean)

 832theorem mobius_twelve : mobius 12 = 0 := by native_decide

Term-mode proof.

 833
 834/-- rad(30) = 30 (squarefree). -/

Lean names referenced from this declaration's body.

mobius in IndisputableMonolith.NumberTheory.Primes.ArithmeticFunctions decl_use