Recursive Subjective Immortality Hypothesis: Nested Simulations, Memory Isolation, and Subjective Time

This conceptual preprint introduces Recursive Subjective Immortality (RSI), a speculative framework for voluntary successive simulated lives with temporary isolation and subsequent restoration of autobiographical memory. It explores progressively accelerated subjective time across nested levels and formalizes an idealized convergent external-time series. It explicitly distinguishes mathematical possibility from physical feasibility, discusses computational constraints and personal identity, and outlines research and ethical questions. No claim is made that consciousness transfer is possible or that the universe is simulated.