Showcase / putnam-1962-b2
Proved by @cgbarlow. Kernel-verified at Gate A; no human in the correctness path.
The goal record the swarm was asked to discharge — the source of truth for this proof's identity and difficulty.
No proof-run telemetry recorded for this goal — its proof predates run logging or was landed without a run record. Difficulty 4.
The Lean statement the swarm proved, kernel-verified at Gate A.
import Mathlib
open MeasureTheory
theorem putnam_1962_b2 : ∃ f : ℝ → Set ℕ+, ∀ a b : ℝ, a < b → f a ⊂ f b := by
sorry