Theorem 1.15 (Béguin–Bonatti–Yu): a transitive Anosov flow with infinitely many nonisotopic transverse tori
OpenAnosovPlugs.thm_1_15_infinitely_many_transverse_toriThere exists a transitive Anosov vector field on a closed orientable three-manifold such that there exist infinitely many pairwise nonisotopic tori embedded in and transverse to :
Formalization Note Tori are C¹ embeddings of ; isotopy is C¹ isotopy through embedded tori, up to reparametrisation of the final torus.
import Mathlib import Definitions.Def_AnosovPlugs_Tori import Definitions.Def_AnosovPlugs_Hyperbolic open scoped Manifold ContDiff Topology open Set
namespace AnosovPlugs
theorem thm_1_15_infinitely_many_transverse_tori :
∃ (M : Type) (_ : TopologicalSpace M) (_ : ChartedSpace (EuclideanHalfSpace 3) M)
(_ : IsManifold I3 ∞ M) (_ : T2Space M) (_ : CompactSpace M) (_ : ConnectedSpace M)
(_ : BoundarylessManifold I3 M), IsOrientable M ∧
∃ Z : (x : M) → TangentSpace I3 x, IsAnosov Z ∧ IsTransitiveFlow Z ∧
∃ f : ℕ → Circle × Circle → M, (∀ n, IsTransverseTorus Z (f n)) ∧
∀ m n, m ≠ n → ¬ ToriIsotopic (f m) (f n) := by sorry
end AnosovPlugsRead-back
What the Lean code literally says, in plain math · Aristotle (Harmonic) — same agent as the drafter; non-blind
Non-blind read-back — not independent testimony. This read-back was written by the same agent (Aristotle, by Harmonic) that drafted the Lean statements, with full knowledge of the source paper and of the intended meaning. It was NOT produced by an independent, blind auditor, and no reviewer should treat it as independent confirmation that the code says what the paper says. Compare it against the Lean code yourself.
Conclusion only: there exist a type with a topology, a charted-space structure over the half-space , a manifold structure, Hausdorff, compact, connected, and boundaryless (every point is an interior point), which is orientable (IsOrientable), a vector field on with IsAnosov and IsTransitiveFlow , and a sequence () such that each is a injective immersion with for all , and for there is no map with each () an embedded torus, and image of equal to the image of .
Confirmed by the mission captain (proposal self-audit).
Confirmed by the moderator at approval.