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The A3X d times Jh minus one product has its certificate

Proved
CKLaneA3X.S_dJh

by marwahaha · Sep 25, 2026 · Mathlib 0df444a (Lean v4.33.1)

a3xgeneral-courtade-kumartaylor-models

The exact original conditional source theorem: assuming Good F_d D_d and Good F_Jhm1 D_Jhm1, their product has the original stored D_dJh certificate. The original multiplication proof and all numerical conditions are retained.

Preamble
import Definitions.Def_A3X_numeric_core
import Definitions.Def_A3X_Step027_data_functions
import Definitions.Def_A3X_enclosure
import Definitions.Def_A3X_Step028_third_chain

set_option maxHeartbeats 0
set_option maxRecDepth 100000
open CKLaneA3X
Formal statement
theorem CKLaneA3X.S_dJh (G_d : Good F_d D_d) (G_Jhm1 : Good F_Jhm1 D_Jhm1) : Good F_dJh D_dJh := by sorry
Source
https://github.com/dpwoodru/general-courtade-kumar-lean/blob/04b6fc3f75b10c3c43702a883ddf888b0608a9a0/browse/CKLaneA3X/Step028.lean#L44

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