Relaxation-Driven Cyclic Cosmology (RDCC) v44.0

RDCC v44.0 is the consolidated release of the Relaxation Driven Cyclic Cosmology research program. This version presents the complete structure of the RDCC ecosystem, which now consists of 99 scientific documents. These include the Flagship Paper, the Summary Paper, 95 Companions, the Numerical Fits and Observational Constraints Paper, and the Speculative Extensions and Conceptual Companions II Paper. Compared to RDCC v43.0, which contained only the first twenty Companions (I to XX), this release introduces the full Companion Series up to XCIX. All Companions from XXI onward are new and expand the theoretical, geometric, numerical, and conceptual foundations of the framework. Three merged Companions replace earlier multi part documents while preserving the historical numbering. The RDCC ecosystem is organized into functional blocks. Each block addresses a specific aspect of the theory or its applications. Block A: Foundations and Core Dynamics Companions I to X develop the mathematical structure of relaxation driven cosmology, the cyclic mechanism, the relaxation kernel, and the global dynamical picture. Block B: Geometry, Phase Space, and Stability Companions XI to XX analyze the geometric formulation, the phase space structure, the bounce stability, and the behavior of the relaxation parameter. These papers form the bridge between the theoretical core and the inference framework. Block C: Inference, Observables, and Probes Companions XXI to XL introduce the inference architecture, the construction of observables, the role of geometric, morphological, and topological probes, and the scale dependent signatures of the relaxation dynamics. Block D: Numerical Structures and Data Pipelines Companions XLI to LX cover numerical methods, simulation strategies, response functions, Fisher information, and the construction of compressed statistics. These papers define the operational tools used in the Numerical Fits Paper. Block E: Topology, Morphology, and Nonlinear Structure Companions LXI to LXXX explore persistent homology, Betti curves, Minkowski functionals, peak and void statistics, and transport based topology. These probes capture the nonlinear relaxation signatures that distinguish RDCC from standard cosmology. Block F: Degeneracies, Null Directions, and Optimal Probes Companions LXXXI to XCIX analyze degeneracy structure, null directions in observable space, cross probe alignment, and the identification of optimal probes. Three merged Companions unify earlier multi part documents and provide a streamlined presentation. The Summary Paper offers a high level synthesis of the main results and explains how the individual components fit together. The Numerical Fits and Observational Constraints Paper presents parameter estimates and validation tests. The Speculative Extensions and Conceptual Companions II Paper discusses broader conceptual implications and possible extensions beyond the predictive core. Version v44.0 integrates all structural updates, including the merged Companions, the expanded Companion Series, and the finalized ecosystem layout. This release is intended as a stable reference point for researchers, reviewers, and readers who want to understand the architecture, motivation, and scope of the RDCC program. All documents are provided as individual PDFs to ensure clarity, accessibility, and long term archival stability. --- Key theoretical outcomes of RDCC RDCC addresses several long-standing cosmological puzzles within a single structural framework based on global CPT symmetry and a bipartite quantum state. The approach provides natural mechanisms for the thermodynamic arrow of time, the replacement of the cosmological singularity by a nonsingular bounce, and the resolution of the Tolman low-entropy problem. Dark matter arises as the gravitational shadow of the CPT-conjugate sector, and the apparent weakness of gravity follows from the sectoral distribution of energy densities. The framework predicts correlated small deviations from the standard cosmological model, including a specific scalar spectral tilt, a dark-radiation excess, a percent-level shift in growth rates, and characteristic oscillations in the stochastic gravitational-wave background. The invariant speed of light emerges as a coherence boundary between the sectors. The late-time acceleration and the coincidence problem follow from the freeze-out behavior of the relaxation parameter. Horizon and flatness problems are resolved through global coherence across the CPT boundary, and baryon asymmetry can arise from asymmetric relaxation or projection effects. The strong CP problem is avoided by global CPT symmetry, and information is conserved globally in the bipartite Hilbert space, offering a natural perspective on the black-hole information paradox. Related documents and the development history of the RDCC framework are available on Zenodo:https://zenodo.org/records/18204087 Michael Lehmannmi.lehmann@gmx.de