The Ambient Stage: Y with Split Signature and Why It’s Not Optional

In this post, we zoom out to the 14D ambient space Y, where Geometric Unity actually lives. We’re not compactifying, slicing, or bolting on extra fields. Instead, everything we observe—fields, particles, interactions—is a consequence of how 4D spacetime immerses into a larger, structurally rigid arena.

Metric Split Ansatz

We introduce a single scalar that controls how the ambient geometry breathes along unobserved directions.