The name "Hadamard–Hamel problem" for the kinetic-energy substitution question predates Robert Singer's 2026 preprint by at least a decade

physicsclassical-mechanicsnonholonomic-systemshistory-of-sciencehistoriographyhamelterminologyprimary-source-verification

Singer's preprint "The Myth of Hamel's Paradox" (arXiv:2609.35857) states that "the Russian literature studies these limits to this day as the Hadamard–Hamel problem" (see claim-substitution-validity-limits-established-1895-1904-before-paradox-label; the term is also recorded as an alias on entity-illegitimate-form-of-the-kinetic-energy). The reference list of Borisov, Mamaev & Bizyaev's 2016 review independently confirms this is not a term coined for or by Singer's paper: it cites "Borisov A. V., Kilin A. A., Mamaev I. S. On the Hadamard–Hamel problem and the dynamics of wheeled vehicles, Regul. Chaotic Dyn., 2015, vol. 20, no. 6, pp. 752–766" — a paper by an overlapping group of Russian authors using exactly that name in a journal title eleven years before Singer's preprint was submitted.

This confirms the name's currency in the specialist literature predates Singer's use of it, supporting his claim that the terminology (unlike "Hamel's paradox" itself) is not a recent coinage. The underlying 2015 paper has not been read at first hand by this vault — only its existence, authorship, and venue, via this citation entry.