theorem proved term proof

`sigma_two_three`

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formal statement (Lean)

1648theorem sigma_two_three : sigma 2 3 = 10 := by native_decide

Term-mode proof.

1649
1650/-- σ_2(4) = 1 + 4 + 16 = 21. -/

Lean names referenced from this declaration's body.

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