Proposal explores geometric duality in black holes and expanding universes, suggesting they describe the same geometry.
A proposal for geometric duality between black hole interiors and expanding cosmologies. Argues that event horizons create observer-complementary descriptions where "black hole" and "universe" are names for the same geometry viewed from opposite sides of a causal boundary. Based on signature flip at horizons, Kantowski-Sachs geometry, and horizon thermodynamics. 1+1=1.
No takes yet. Share an insight, caveat, or question.
Sky Bravo (2026) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: