The Origin of the Universe and Space: A Unified Framework for the Evolution of Spacetime, Gravity, and Dark Energy

本理论框架 HCSOT (Hu's Cosmic Space Origin Theory, 胡氏宇宙空间起源理论) 及其核心公理体系、引力/排斥力统一转换机制、时空能量密度演化方程、以及定量预言 (弱引力透镜在 k=0. 1 h/Mpc 处 8%±3% 增强) 均为本人独立原创。相关数学形式与核心构想已于 2026 年 4 月 10 日在 Zenodo 首发版本 (DOI: 10. 5281/zenodo. 19489908) 中永久存档。本 V5. 0 为战略性更新, 理论核心完全承袭自首发版本, 任何后来者不得声称独立发现。 【Originality Statement】 The theoretical framework HCSOT (Hu's Cosmic Space Origin Theory), including its core axioms, the unified gravity/repulsion conversion mechanism, the space-time energy density evolution equations, and the quantitative prediction (8%±3% enhancement of the weak gravitational lensing power spectrum at k = 0. 1 h/Mpc), is entirely the independent original work of the author, Hu Helong. The complete mathematical formalism and core concepts were permanently archived in the first Zenodo release on April 10, 2026 (DOI: 10. 5281/zenodo. 19489908). This V5. 0 is a strategic update; the theoretical core remains fully consistent with the first release. Any later claimant to independent discovery is hereby precluded by this public record. --- We present Hu's Cosmic Space Origin Theory (HCSOT), a minimalist, self-consistent cosmological framework in which the single dynamical degree of freedom is the local energy density ρ of the spacetime substrate. Gravity emerges as the response to deviations of ρ from a universal critical equilibrium density ρ₀: ρ > ρ₀ produces attractive gravity (the "dark matter" regime), while ρ 10 observed by JWST, and persistent small-scale tensions including dwarf galaxy rotation curves—all within a unified, parameter-efficient framework. We formulate HCSOT as a scalar-tensor theory with a canonical action, derive the modified cosmological perturbation equations, and compute the effective gravitational coupling Gₑff (z). The theory makes a single flagship falsifiable prediction for the Euclid satellite mission (first major data release DR1, October 2026): at wavenumber k = 0. 1 h/Mpc, the weak gravitational lensing matter power spectrum will exceed the ΛCDM prediction by 8% ± 3% (1σ). A set of secondary consistency checks is also provided. The model introduces one additional free parameter (α) beyond standard cosmology. HCSOT is sharply falsifiable and provides a complete, observationally grounded alternative to the ΛCDM paradigm.