Three-Dimensional Manifolds As Slices of Infinite-Dimensional Hilbert Manifolds: A Geometric Model of the Universe: Three-Dimensional Manifolds As Slices of Infinite-Dimensional Hilbert Manifolds. Dhaka Univ. J. Sci. 2025, 73 (2), 187-195. https://doi.org/10.3329/dujs.v73i2.82778.