arXiv2026
We bring Shelah's theory of independence and Todorčević's classification of Rosenthal compacta to bear on limits of computations beyond the continuous case. The first paper of this series characterized computability through continuous extendibility in a framework for floating-point computation. Limits of continuous computations may nevertheless be discontinuous, as familiar iterative algorithms demonstrate. We identify the regime in which these limits remain of the first Baire class and apply its structure theory to classify their complexity. For countably many real-valued features, and assuming continuous extendibility of computations, the absence of the independence property on the prescribed invariant bounded regions is equivalent to first-Baire-class regularity of all limits of the extended computations on the corresponding completed regions. Every such limit is consequently the pointwise limit of a sequence of extended computations on each completed region. For countable families acting continuously on a compact metrizable state space, this is the tame regime of topological dynamics, whose hierarchy Glasner and Megrelishvili obtained from Todorčević's trichotomy. We transport that classification to computation structures and realize every level by a rotation, the power method, the planar and spatial Bresenham algorithms, and the action generated by Euclidean steps on the projective line. Newton's method for the square roots of unity on the Riemann sphere lies beyond the tame regime. Under the same extendibility assumption, a measure-theoretic counterpart for arbitrary feature families characterizes the absence of independence by featurewise universal measurability of the same limits. For every Radon input probability measure, each output feature is then uniformly approximable by polynomials in the input features outside a set of arbitrarily small probability.