Structural Localization under Non-Constructive Constraint

This paper presents a non-constructive formulation of structural localization. Difference-configuration is fixed without recourse to mapping, assignment, or set-theoretic construction. Constraint is not treated as an operation but as a non-cyclic and non-branching condition under which difference does not return and does not branch. Within this framework, identity retention is fixed as an internal structural condition. Retention and non-retention do not constitute independent terms but appear only as loci under constraint. Persistence is fixed as the non-collapse of retention, and localization is given as the internal structural differentiation of persistence. The framework excludes constructive definition at the level of these loci. Assignment is not admitted, as it fixes terms as independent entities and thereby conflicts with their relational status. No difference-configuration admits global retention, propagation, reconstruction, or closure. Structure is fixed without construction.