The Omni Current Theory: Spacetime as Emergent Hydrodynamics

Vacuum, gravity, and medium are not three phenomena but one. This paper introduces the Current: a dynamical continuum whose mechanical properties are fully determined by two parameters, the stiffness Ξ = c⁴/8πG ≈ 4.8 × 10⁴² Pa and the dissipation coefficient λ = G/c³ ≈ 2.5 × 10⁻³⁶ s/kg. No free parameters are introduced. The spacetime metric gμν emerges from the Current's density and velocity fields through the Einstein equations; Newton's law of gravitation is derived explicitly from hydrostatic equilibrium in five algebraic steps. The modified Navier–Stokes momentum equation includes an intrinsic dissipation term −λρ|v|²v that is negligible for ordinary flows but dominates at relativistic velocities and Planck-scale densities. Global regularity of the incompressible system is proven rigorously via Gagliardo–Nirenberg interpolation (Theorem 1): the damping term provides the L⁴ control that classical Navier–Stokes lacks, closing the energy estimates and disabling vortex stretching. The Current fills a Poincaré dodecahedral space (PDS) whose topology is not assumed but derived from the factorial hierarchy Dₙ = (n+1)!/2 and the subgroup lattice of the binary icosahedral group 2I. The eigenmode selection rule of I* forbids CMB multipoles ℓ = 1, 2, 3, providing a representation-theoretic mechanism for the observed quadrupole suppression. Confirmed predictions: CMB quadrupole suppression (factor ~6 below ΛCDM) and gravitational wave speed cg = c (GW170817). Supported predictions: directional Hubble modulation at 3–5% (Hu et al. 2024, 4–5σ; Salzano et al. 2025, 3.9σ) and Cosmicflows-4 null test consistent with predicted cell size ~2300 Mpc. Ten of twelve formal correspondences between PDS and the E8 root lattice are established in a companion paper. The framework connects to the Theory of Temporal Spheres (cosmological applications) and the Theory of Temporal Groups (algebraic structure) through the identity Ξλ/c = 1/8π = D₀/4π. There is only the Current. Everything else is shape.---Ξυα Mσςςeva@m0ss.io