Sections of a line bundle on an affine scheme are finite
ProvedOAI.MaximalSeshadri.Geometry.LineBundle.affine_openSections_finitemaximal-seshadrioai-math
For an affine scheme and a line bundle , OpenSections L.sheaf ⊤ is a finite -module.
Formalization Note The statement is verbatim from OpenAI's Lean development, with Definitions files of this development imported in place of the upstream modules; these are supporting code for the statement.
Preamble
import Mathlib
import Definitions.Def_MaximalSeshadriConstants
import Definitions.Def_SeshadriPrelim6
namespace OAI
section
noncomputable section
section
namespace MaximalSeshadri.Geometry
noncomputable section
open AlgebraicGeometry CategoryTheory TopologicalSpace Opposite
variable {X Y : Scheme.{0}}
Formal statement
theorem LineBundle.affine_openSections_finite [IsAffine X] (L : LineBundle X) :
Module.Finite Γ(X,⊤) (OpenSections L.sheaf ⊤) := by
sorry
end
end MaximalSeshadri.Geometry
end
end
end
end OAI
Source
OpenAI, Maximal Seshadri constants on arbitrary polarized surfaces, September 23, 2026, https://github.com/openai/math (paper: preprints/Maximal-Seshadri-Constants-on-Arbitrary-Polarized-Surfaces-September-23-2026/main.pdf; Lean: lean/OAI/AlgebraicGeometry/Seshadri, Apache License 2.0); Lean declaration `OAI.MaximalSeshadri.Geometry.LineBundle.affine_openSections_finite`, https://github.com/openai/math/blob/adc7f1241b42e322a6451854ab7e4b4c146bf78a/lean/OAI/AlgebraicGeometry/Seshadri/Sheaves/AffineLocalizing.lean#L129