theorem proved term proof

`sigma_zero_six`

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formal statement (Lean)

 977theorem sigma_zero_six : sigma 0 6 = 4 := by native_decide

Term-mode proof.

 978
 979/-- σ_1(6) = 12 (sum: 1 + 2 + 3 + 6 = 12). -/

Lean names referenced from this declaration's body.

sigma in IndisputableMonolith.Decision.AbileneParadox decl_use
sigma in IndisputableMonolith.NumberTheory.Primes.ArithmeticFunctions decl_use