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formal statement (Lean)
1128theorem mobius_twenty : mobius 20 = 0 := by native_decide
proof body
Term-mode proof.
1129
1130/-! ### More squarefree values -/
1131
1132/-- 42 = 2×3×7 is squarefree. -/
depends on (5)
Lean names referenced from this declaration's body.
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is
in IndisputableMonolith.Foundation.OptionAEmpiricalProgram
decl_use
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is
in IndisputableMonolith.Foundation.SimplicialLedger.EdgeLengthFromPsi
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is
in IndisputableMonolith.GameTheory.MechanismDesignFromSigma
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is
in IndisputableMonolith.Mathematics.RamanujanBridge.MockThetaPhantom
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mobius
in IndisputableMonolith.NumberTheory.Primes.ArithmeticFunctions
decl_use