BU01 Single-Universe Boundary Axiomatics

This paper introduces Single-Universe Boundary Axiomatics, a minimal formal framework for re-grounding physical intelligibility in the global uniqueness of boundary conditions. Its central claim is that universe-level unity is not a metaphysical slogan, but a structural condition: a universe is single if and only if its physical boundary condition is globally unique and invariant across the entire domain of existence. This principle is formalized as S \equiv B_U, where B_U denotes global boundary consistency over the total admissible domain U, and B_0 denotes the unique fixed boundary set. On this basis, the framework derives three consequences: global law admissibility L_U, global constant admissibility C_U,…