Towards Inertial–Gravitational Equivalence from Transformation and Projection within the ACORN Framework

Transformation, Projection, and a Route Toward Inertial–Gravitational Equivalence in the ACORN Framework This note explores a possible Closure Theory route toward the origin of inertial–gravitational equivalence within the ACORN framework. A central distinction is introduced between transformation and projection. Transformations preserve information and connect two fibre descriptions of the ACORN structure: the intrinsic fibre (mNE, mₑq) and the relativistic fibre (mE, mC), where mE = E/c² and mC = pᵢnt/c. By contrast, projections discard information and generate observable quantities such as mass, charge, fields, and forces. This motivates a three-domain architecture: T-domain ↔ t-domain → Observable Domain. The intrinsic T-domain and relativistic t-domain are related by transformation, while observable physics emerges through projection. Within this framework, the ACORN fibre possesses the invariant m² = mE² − mC², which is identical to the standard Special Relativistic energy–momentum invariant m² = E²/c⁴ − p²/c². The paper argues that mass and charge may arise from different projections of the same underlying fibre. Mass is associated with the invariant projection m = √ (mE² − mC²), while charge is associated with a hierarchy of odd-residue projections beginning with ρ = mC/mE. This leads naturally to a possible route toward inertial–gravitational equivalence. If both inertial and gravitational mass couple to the same projected invariant of the ACORN fibre, then mI = mG follows as a structural consequence rather than as an independent postulate. The purpose of this note is not to claim a derivation of the Equivalence Principle. Rather, it formulates a conceptual and mathematical framework within which such a derivation may become possible. The resulting picture provides a constructive connection between the ACORN formulation of Closure Theory and the established energy–momentum structure of Special Relativity, while identifying transformation and projection as potentially fundamental organising principles.