ψ-Retention Cosmology — Grant- & Museum-Ready Summary (2026)

This Grant- & Museum-Ready Summary presents the core scientific, mathematical, and conceptual foundations of ψ-Retention Cosmology — a field-theoretic architecture in which structural difference (Δψ) persists beyond dynamical decay through a finite internal node Ξ and an equilibrium term Λψ. The document consolidates the retentive Lagrangian, stability floor, Euler–Lagrange dynamics, operational invariants (Λψ, Ξc, Δψ_floor, τψ, Rc), and a complete observational prediction suite for the 2026–2027 Euclid, Planck, Roman HLS, ACT, and JWST cycles. It is designed both for high-risk/high-reward funding bodies (Templeton, Simons, Perimeter, ERC, NSF, NASA) and for leading museums (MoMA, ZKM, Tate, MIT Museum), where ψ-Retention serves as a scientific backbone for ψ-artifacts and cosmological conceptual works. The summary positions retention as a universal mode of structure — operating beyond dynamics, geometry, and spacetime.