What question did this study set out to answer?

The aim is to establish ψ-Retention Cosmology as a framework for understanding late-time cosmic evolution through geometric stability thresholds.

January 20, 2026Open Access

ψ-Retention Cosmology: A Structural Framework for Late-Time Stability Beyond Dynamical Suppression

Key Points

The aim is to establish ψ-Retention Cosmology as a framework for understanding late-time cosmic evolution through geometric stability thresholds.
Introduced a minimal retentive term in cosmological models.
Preserved metric consistency at η = 1.
Outlined the Retentive Growth Theorem and Λψ Lagrangian.
Forecasted Euclid DR1 predictions and established falsification criteria.
Provided explanations for the S₈ suppression and anomalous growth index.
Described weak ISW signal and Planck A_L anomaly under the new framework.
Demonstrated the implications of a unified set of structural invariants.

Abstract

This article is part of the ψ-Architecture Research Series, Volume IV. It presents ψ-Retention Cosmology (Λψ), a structural framework in which late-time cosmic evolution is governed not by dynamical decay but by the emergence of geometric stability thresholds. The theory introduces a minimal retentive term, preserves metric consistency (η = 1), and explains the S₈ suppression, the anomalous growth index, the weak ISW signal, the Planck AL anomaly, and the scale-invariant void-lensing deficit through a single structural mechanism. The paper includes the Retentive Growth Theorem, the Λψ Lagrangian, Euclid DR1 predictions, explicit falsification criteria, and a unified set of structural invariants.

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