No prose has been written for this declaration yet. The Lean source and graph data below render
without it.
generate prose now
formal statement (Lean)
1474theorem deficient_eight : sigma 1 8 < 2 * 8 := by native_decide
proof body
Term-mode proof.
1475
1476/-- 9 is deficient: σ_1(9) = 13 < 18. -/
depends on (6)
Lean names referenced from this declaration's body.
-
sigma
in IndisputableMonolith.Decision.AbileneParadox
decl_use
-
is
in IndisputableMonolith.Foundation.OptionAEmpiricalProgram
decl_use
-
is
in IndisputableMonolith.Foundation.SimplicialLedger.EdgeLengthFromPsi
decl_use
-
is
in IndisputableMonolith.GameTheory.MechanismDesignFromSigma
decl_use
-
is
in IndisputableMonolith.Mathematics.RamanujanBridge.MockThetaPhantom
decl_use
-
sigma
in IndisputableMonolith.NumberTheory.Primes.ArithmeticFunctions
decl_use