This paper formalises the identity I = p within the Cohesion Unied Field Theory framework1: inertia is locally identical to the pressure transmitted into the observable domain from thenext higher scale of the cosmic hierarchy, and integrally identical to the energy E = pr. Inertia,conventionally treated as an unexplained property of mass, is here derived from the foundationalaxiom of the framework that the observable universe is a pressure-bound domain and shownto be the resistance oered by the pressure eld to displacement of a trapped recursion 2. Thederivation proceeds through the established operator chain (Tension → Surplus → Torsion → Slip→ Acceleration → Maintained Motion) 1 and yields the local relation I = p together with theintegrated relation Itotal = pr, identical to the energy identity. Inertial mass m = pr/c2follows as aconsequence in the regime where c is constant. The equivalence of gravitational and inertial massbecomes a theorem rather than a postulate: both reduce to pr evaluated under gradient operations(gravity) and displacement operations (inertia) 3. The MOND regime is identied as the recursionsuppression limit in which the local pressure dierential approaches the cosmological background,with the suppression factor µ(a/a0) already characterised in the Cohesion UFT Rotation-CurveLaw 5. Mach's principle is dispensable: the pressure eld itself provides the relational mediumagainst which inertia is measured, with no global summation over distant masses required.Keywords: inertia, pressure, Cohesion UFT, foundational axiom, equivalence principle, MONDregime, recursion volume, Mach's principle.
Dexter Gilbert (Thu,) studied this question.