The Frostyverse: Discrete-Grid Candidate for Diagonal Propagation, Isotropy, Rotational Invariance, and Lorentz-Compatible Kinematics

The Frostyverse investigates whether a discrete elastic three-dimensional grid can reproduce observed directionally uniform and Lorentz-compatible behavior without inserting those outcomes directly into the candidate mechanics. This publication focuses specifically on the discrete-grid diagonal problem, isotropy, rotational invariance, and preferred-frame/Lorentz consistency. The current computational candidate separates the continuous physical direction carried by a FrostQuanta from the discrete FrostNode at which a local transfer completes. The published test chain includes isotropic local FrostSegment response, midpoint-isochronous FrostTransit, three-dimensional FrostNode response, whole-setup rotational covariance, moving-clock behavior, reciprocal FQ↔FrostSegment moving-ruler response, arbitrary boost orientations, acceleration and deceleration histories, velocity reversal, reorientation, and deliberately failing negative controls. The Lorentz comparison quantities are evaluated after the Frostyverse calculation rather than supplied as targets to the candidate solver. The accompanying Supplementary Reproducibility Package contains the frozen publication source, current Python test programs and result records, negative controls, historical provenance, run instructions, claim-to-file mapping, and SHA-256 manifests so the calculations can be independently reproduced, modified, and attacked. The result is intentionally limited to computational sufficiency for the implemented tests. It is not experimental evidence that the Frostyverse describes nature, does not establish complete Lorentz invariance, and does not establish that the tested microscopic rules are unique. Project website and interactive laboratory: https://frostyverse.frostcandy.com Foundational Frostyverse publication: DOI 10.5281/zenodo.21854770