Unification of All Physical Forces: Gravity, EM, Weak and Strong as a Single Zulfia Arithmetic Force Field ∆⁰

The unification of the four fundamental forces — gravity, electromagnetism,the weak force, and the strong force — has been the central unsolved problem oftheoretical physics for over one century, and the history is a history of beautifulfailures.The only previous unification was Glashow-Salam-Weinberg unification of twoforces — electromagnetism and the weak force (Nobel Prize 1979). This is notan extension of that work. The electroweak theory assumes SU (2) × U (1) asinput. Zulfia Theory invents a new framework where all four forces — gravity,EM, weak, and strong — are derived as manifestations of a single Arithmetic Forcefield ∆0(x, u). Four forces, one origin. No larger gauge group assumed.This paper solves the problem within Zulfia Theory, founded on Zulfia MappingZ(x, u) = η(x, u) + ∆0(x, u) [1]. We prove that all four fundamental forces are notdistinct entities but manifestations of a single object: the Arithmetic Forcefield ∆0(x, u).Four theorems are proved:Gravity Recovery: ∆0 → Gμν under metric curvature limit,EM Recovery: ∆0 → Fμν under gauge field limit,Weak Recovery: ∆0 → W ±, Z0 under symmetry-breaking limit (Salam limit),Strong Recovery: ∆0 → Aaμ under colour charge limit.A Master Force Equation is derived:F μ[∆0] = −Dμ∆0(x, u) (1)from which all four forces emerge by restricting the domain and the operator Dμ.Gravity. Electromagnetism. Weak. Strong. Four forces. One equation. Onefield — the Arithmetic Force.