 Marco Giovanelli (2017) argues that the mathematical core of the development of special relativity is found in the Riemannian tradition and especially in the work of Christoffel, Lipschitz, Ricci, and, later, Levi-Civitá (Giovanelli 2017, 328). Giovanelli argues that the claims for the Helmholtzian tradition as the sole progenitor of special relativity are exaggerated, and that the real development was a ‘collision’ of traditions, in the sense well known from John Norton’s paper on the Kleinian and Riemannian traditions in general relativity.