math.NT — Number Theory
The central charge of an arithmetic system: a seven-world framework
To an arithmetic system (prime elements, norms, weights, -functions) we attach the central charge . Seven worlds share it: number fields, function fields, graphs, finite-type dynamics, knots, tropical geometry, and arithmetic dynamics. We record four universal laws with their exact status. (I) Index-set identity in all seven worlds (number fields to , tropical skeletons to ). (II) Critical law , with the distance to the controlling singularity: a pole (Tate) or the natural boundary (cuspidal); measures reachability ( Tate, cusp). (III) Diagonal main-term theorem: entire iff cuspidal iff no diagonal main term iff vanishing connected/remainder ratio; item (v) (never-saturating spectral form factor) is at conjecture level, the bridge closed by a companion paper's recurrence-peak criterion. (IV) Law of forgetting in six formulations, unified: forgetting = increasing = rising diagonal fraction = approaching the semicircle (free) = setting . The core dichotomy (horizontal coordinate universal, amplitude fingerprinted) is checked on moments. The 24 network (, Yau--Zaslow, ) and the Neron wild tables are included; everything carries a status label and a corrections register. We prove neither abc, Szpiro, RH, nor BSD.