central projection framework established in prior papers 1–3. Both limits R → ∞ and R → 0 are geometrically regular. For R → 0, a structural tension arises between the geodesic deviation upper bound and local curvature. A nested structure of subjective spaces (Proposition 4.1) is shown to be constructible from existing geometric degrees of freedom, resolving this tension within the framework. No physical claims are made.
Noriaki Kihara (Sun,) studied this question.