Theorem: under the IMM axioms, the past has greater informational volume than the future, Sₚast > Sfuture. The arrow of time is not an emergent statistical phenomenon but a structural consequence of projection-driven dynamics: the projection of completed states constructs a thicker history than the projection of unrealized futures. This produces the empirical asymmetries of memory, causality, and entropy without invoking statistical mechanics or initial conditions. Inherits from Paper 0 (axioms A1-A6).
Travis Bergen (Mon,) studied this question.