Inversion-Closure Model A symmetric closure model of binary differences

This document specifies a minimal structural model called the Inversion-Closure Model (ICM). It describes a mechanism by which binary differences, when composed under symmetry operations, do not diverge indefinitely but instead collapse into a closed state.No symbolic, semantic, physical, or metaphysical interpretation is assumed. The model concerns only the structural behavior of differences under inversion and composition. A concrete realization of this closure behavior is provided separately as the Mirror-Inversion Cycle (MIC), a finite circular ordering of binary states.