Ontological Divergence and Admissibility Flow in the Second Degree of Selector-Time Theory: A Preliminary Formalism for the REV → CRIT → IRREV Regimes

This technical essay presents a preliminary formalism for interpreting divergence, not as physical divergence in spacetime, but as a controlled mathematical analogy for the flow of admissibilities in the Second Degree of Selector-Time Theory (STT). The paper proposes a minimal formal structure for distinguishing the REV, CRIT, and IRREV regimes through an admissibility domain, a formal STT flow field, a Tau selection functional, ontological divergence, and CAL hardening. It does not derive new physical predictions, does not claim empirical validation, and does not propose replacing established operational physics. The deposit includes the English version of the article, a Portuguese version, the Python source code used in the computational implementation, and the PNG figures generated by the script. The computational model is presented as a tool demonstrator: a minimal, auditable, and reproducible formal laboratory for visualizing admissibility flow, selective compression, Tau gap evolution, local ontological divergence, and CAL hardening. The purpose of this work is to contribute to the mathematical formalization program of STT by making explicit the distinction between admissibility, selection, stabilization, and irreversible inscription across the REV → CRIT → IRREV transition.