Domain Interaction Cosmology — A Geometric Theory of Dark Matter, Dark Energy, Lensing, Halos, and Cosmic Anomalies

The Domain Interaction Cosmology is the flagship observational branch of the Geometric Cosmology framework. The central proposal is that multiple spacetime domains embedded in metaspace need not remain geometrically isolated. Instead, they can influence one another through structured interaction channels, producing effective curvature, halo, background, torsional, and anisotropic responses inside a given domain. The interaction is formulated using a metaspace kernel and a channel–junction architecture, then applying the model to the major puzzles usually attributed to dark matter and dark energy. A key result is an explicit toy-model calculation of the effective dark-energy-like to dark-matter-like ratio, yielding an illustrative value of 2.19 from dimensional-analysis scale hierarchy.