Based on 9D-USTE topological manifold framework, this paper derives universal high-dimensional to low-dimensional projection rules, establishes the mapping between dimensional combination and physical laws, and proves that 4D physics (gravity, quantum entanglement) is the low-dimensional projection of 9D topology. A unique observable signature Δφ = π/4 · τ₉, 4 is proposed for experimental verification.
Houlang Li (Tue,) studied this question.