Cross-Domain Structural Invariance of the Paton System

This paper demonstrates that the recursive lifecycle defined within the Paton System is structurally invariant across multiple independent domains. Through instantiation in financial systems, artificial intelligence systems, and healthcare systems, it is shown that system existence, continuation, and termination follow a common admissibility-governed architecture. This invariance indicates that the lifecycle is not domain-specific but represents a pre-explanatory structural condition underlying all viable systems. The work establishes cross-domain structural invariance as a foundational property of admissible systems.