PFUSRC-154 Unified Topological Interpretation of Extreme Cosmic Phenomena in the Topological Mother Universe ——and the Isomorphic Overflow Effect at Black Hole Sub-Universe Boundaries

A wide range of extreme cosmic phenomena such as black holes, magnetars, gamma-ray bursts, quasars, cosmic voids and cold spots can only be fragmentarily explained by general relativity, quantum field theory and the ΛCDM model without a unified ontological foundation. Relying on PFUSRC seven-layer hierarchical ontology and wisdom determinism, this paper establishes that all astronomical observations belong to the L5 projection layer of the higher-dimensional topological mother universe, and all extreme celestial bodies are threshold responses of PNRMTS prime-node grids under compression, torsion and energy gradients. This paper proposes the core innovative judgment of isomorphic overflow mirror effect on black hole event horizons: supermassive black holes contain complete nested sub-universe structures replicating all hierarchical rules of the mother universe; local L5 topological deformation can overflow the event horizon and form miniature homologous mirror extreme structures around black holes. This paper gives unified topological reassignment for all types of compact stars, high-energy bursts and large-scale cosmic anomalies, and puts forward a set of falsifiable astronomical corollaries, finally forming a self-consistent closed-loop topological cosmology covering micro matter, life, celestial bodies and nested mother-sub universes.