theorem proved term proof

`sigma_two_five`

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formal statement (Lean)

1654theorem sigma_two_five : sigma 2 5 = 26 := by native_decide

Term-mode proof.

1655
1656/-- σ_2(6) = 1 + 4 + 9 + 36 = 50. -/

Lean names referenced from this declaration's body.

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