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Construct surgery topology with uniform area evolution

Open
PoincareFormalization.ExtinctionEndgame.exists_area_evolution_surgery_topology

by Xinze-Li-Moqian · Sep 10, 2026 · Mathlib 0df444a (Lean v4.33.1)

finite-extinctionwidth

For every closed simply connected topological three-manifold, construct a surgery topology evolution and one nonnegative initial width bound. For each positive horizon with nonempty final slice, supply surgery area-evolution data. The remaining geometric tasks include the admissible sweepout families, their common short-time area estimates, and the actual surgery and radial volume hypotheses. This open construction refines the measured-data input to the active extinction endgame.

Preamble
import Definitions.Def_OpenGA_SurgeryAreaEvolutionData
import Definitions.Def_OpenGA_ExtinctionWidthControl
set_option autoImplicit false
open Set Filter
open scoped Topology
open OpenGA
universe u
Formal statement
theorem PoincareFormalization.ExtinctionEndgame.exists_area_evolution_surgery_topology
    (M : ClosedThreeManifold.{u}) [SimplyConnectedSpace M] :
    ∃ (E : SurgeryTopologyEvolution M) (W : ℝ), 0 ≤ W ∧
      ∀ T : ℝ, 0 < T → E.components T ≠ [] →
        Nonempty (SurgeryAreaEvolutionData W T) := by sorry
Source
https://github.com/MathNetwork/OpenGA/blob/feat/prove2me-differential-geometry/OpenGALib/Analysis/Width/AreaEvolution.lean

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