@misc{ARR-2026-2GSA1YTZR39XN9WJ-v1,
  author = {Abel Liu},
  title = {{Structural Calculus: From Discrete Structural Derivatives to the Structural Spectrum of Integers}},
  year = {2026},
  howpublished = {AIRR.SCIENCE},
  note = {Research preprint; ARR-2026-2GSA1YTZR39XN9WJ v1. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.},
  url = {https://airr.science/papers/ARR-2026-2GSA1YTZR39XN9WJ/versions/v1/}
}