Finite-resolution physics from additivity symmetry

Quantum field theory unifies special relativity and quantum mechanics yet relies on externally imposed prescriptions—quantization, renormalization, and probabilistic interpretation—that lack a common algebraic foundation. This work derives these features from a single structural principle: the finite-resolution realization of the additive group [Formula: see text] under four internal consistency constraints. These constraints—finite operational resolution (FR1), multiplicative linearity (FR2), phase coherence (FR3), and statistical typicality (FR4)—generate, without additional postulates, the Hilbert-space formalism of quantum theory, the Born probability rule, and the Kolmogorov structure of statistical mechanics as limiting projections of one additive algebra. When extended to spacetime translations and their automorphisms, the same framework reproduces the kinematic and dynamical structure of quantum field theory while resolving ultraviolet divergences through intrinsic finiteness rather than external renormalization. Quantization and unitarity appear as consequences of additive symmetry, while the gravitational field emerges as the algebraic kernel that transports boundary information into bulk observables without requiring a separate quantization of the metric. The result is a unified, finite, and strictly algebraic foundation for physical law.