The Hodge Conjecture proposes that, on a smooth projective complex algebraic variety X, every rational Hodge class is a Q-linear combination of cohomology classes of algebraic subvarieties. Formally: for X smooth projective over C, H^p, p (X) H^2p (X, Q) = Z ₐ where Z ranges over algebraic cycles of codimension p. This companion deposit proposes that the Hodge Conjecture is the formalism-substrate-resolution-class readout of an underlying substrate-coupling-architecture in which abstract cohomological classes and geometric algebraic cycles are substrate-coupling-architecture-identity-persistence-readouts at two substrate-resolution-classes. The architectural-mechanism: IE-016 (Identity / Persistence) operates across the projection from geometric-substrate (algebraic cycles) to cohomological-substrate (Hodge classes). The Hodge Conjecture asserts that this projection admits identity-persistence-substrate — i. e. , every cohomological readout (Hodge class with rational coefficients) corresponds to a geometric-substrate-coupling-architecture realization (algebraic cycle). Architectural translation: the HLRP #1 Approach Geometry of Amplitude Zeros methodology (Zenodo DOI 10. 5281/zenodo. 18727570 (https: //doi. org/10. 5281/zenodo. 18727570), originally developed at gauge-field amplitude-substrate, then extended to Riemann zeta-zeros in Companion II) applies at the algebraic-cohomology-substrate-resolution-class. Same architectural-substance: amplitude-zero / cohomology-class distribution as substrate-coupling-architecture-substance with axial closure-coordinate constraints. Cross-substrate manifestation: abstract-to-geometric identity-persistence renders at: algebraic-cohomology-substrate (Hodge, this paper) ; zeta-function-substrate (Riemann, Companion II) ; gauge-field-substrate (Yang-Mills, Companion III) ; elliptic-curve-substrate (BSD, Companion VI) ; fluid-substrate (Navier-Stokes, Companion IV) ; cardiac-substrate (HLRP #198 v3 empirical). Same architectural-mechanism rendered at six substrate-resolution-classes. Internal-grammar consistency is the load-bearing closure. Keywords: Hodge Conjecture; algebraic cycles; cohomology; complex algebraic varieties; smooth projective; Millennium Prize Problems; substrate-coupling architecture; Hydrogen Lifecycle Research Programme; HLRP; approach geometry of cohomology substrate; IE-016 Identity Persistence; IE-019 Residual; IE-007 Perceptual Closure; abstract-to-geometric closure; identity-persistence-substrate; cross-substrate architectural mechanism; architectural formalization
James E. Dunn (Wed,) studied this question.