Green's theorem on the standard triangle #
The independently constructed graph divisions and their geometric comparison certificates
give Green's theorem on the genuine convex hull of 0, 1, and I. The boundary consists
of the three actual straight paths. For fields C¹ near the triangle, all gauge, curve,
and area integrability hypotheses follow from continuity and compactness.
theorem
TauCeti.Green.green_standardTriangle
{U : Set ℂ}
(hU : IsOpen U)
(hTU : standardTriangle ⊆ U)
{P Q : ℂ → ℝ}
(hP : ContDiffOn ℝ 1 P U)
(hQ : ContDiffOn ℝ 1 Q U)
:
MeasureTheory.IntegrableOn (curl P Q) standardTriangle MeasureTheory.volume ∧ curveIntegral (oneForm P Q) (Path.segment 0 1) + curveIntegral (oneForm P Q) (Path.segment 1 Complex.I) - curveIntegral (oneForm P Q) (Path.segment 0 Complex.I) = ∫ (z : ℂ) in standardTriangle, curl P Q z
Green on the standard triangle for fields C¹ on any open neighborhood. The three
Bochner curve integrals add the edges from 0 to 1 and from 1 to I, and subtract
the edge from 0 to I.