The Einsteinian Canonical Preimage Geometry

The Einsteinian Canonical Preimage Geometry defines the maximal preimage-level geometric framework from which the entire Einsteinian Stack arises through admissible reductions and coarse-grainings. The paper introduces the Absolute Frame—comprising primitive distinguishability, universal symmetry, universal projection, and universal operator and curvature seeds—and proves that all Stack-level structures are derived images of this preimage geometry. No new primitives appear at the preimage level; instead, Absolute Geometry serves as the canonical source from which the closed primitive set of Paper 29 is recovered. This establishes the unique, non-extendable preimage representation of the Einsteinian Stack.