OAI/Analysis/AffineBernstein/ActualProjectiveAreaChart.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

1. theorem OAI.AffineBernstein.affineEpigraph_projective_isometry_area_density line 25

   Source documentation

   A true affine area density in any isometric projective chart; the spherical angular basis can be chosen independently of the planar one.

   theorem affineEpigraph_projective_isometry_area_density {n : ℕ} {Ω : Set (Space n)}
       (hΩ : IsOpen Ω) (hcv : Convex ℝ Ω) {u : Space n → ℝ}
       (hu : ContDiffOn ℝ ∞ u Ω) (hp : ∀ x ∈ Ω, (hessian u x).PosDef)
       (a : Space n × ℝ) (L : (S × E) ≃L[ℝ] (Space n × ℝ))
       {D : Set S} (hD : IsOpen D)
       (hK : ∀ s ∈ D, IsCompact {y | (s,y) ∈ affineEpigraphPullback Ω u a L})
       (hzero : ∀ s ∈ D, (0:E) ∈ interior {y | (s,y) ∈ affineEpigraphPullback Ω u a L})
       {s : S} (hs : s ∈ D) (bS : Module.Basis ι ℝ S)
       (bE bRef : OrthonormalBasis (κ ⊕ Unit) ℝ E)
       (f : WithLp 2 (F × ℝ) ≃ₗᵢ[ℝ] E)
       (hlast : bE (Sum.inr ()) = f (WithLp.toLp 2 (0,(1:ℝ)))) (x : F) :
       let H := fun q : S × E => homogeneousSupport {y | (q.1,y) ∈ affineEpigraphPullback Ω u a L} q.2
   …

   Mentions: OAI.AffineBernstein.Space, OAI.AffineBernstein.hessian, OAI.AffineBernstein.affineEpigraphPullback, OAI.AffineBernstein.homogeneousSupport