Mass curves spacetime because mass is localized topological tightening of the closed cosmos

This paper proposes a self-consistent topological framework that attempts to describe the universe from first principles without prior assumptions. Starting from the instability of absolute nothingness, we show that a closed cosmic structure inevitably emerges as a stable form of existence, which corresponds to the 3‑dimensional real projective space RP³. In this closed manifold, local topological knots naturally arise as intrinsic fluctuations of the overall structure; these knots are identified with elementary particles. Mass corresponds to the degree of local tightening of the topological structure, while gravity appears as a natural tendency of the system to restore global topological equilibrium. This framework provides a unified interpretation for spacetime, matter, gravity, and the emergence of life and consciousness, and may offer a new perspective for understanding the fundamental consistency of physical laws. wxsq1638@outlook.com Xinyu Zheng Physical Theory;https://doi.org/10.5281/zenodo.19571808