Leonard Roth (29 August 1904 Edmonton, London, England – 28 November 1968 Pittsburgh, Pennsylvania) was a mathematician working in the Italian school of algebraic geometry. He introduced an example of a unirational variety that was not rational (though his proof that it was not rational was incomplete).
- Levy, H.; Roth, L. (1936), Elements of probability, The Clarendon press
- Roth, L. (1949), Modern elementary geometry, Modern Elementary Geometry, Thomas Nelson and Sons Ltd.
- Roth, L. (1955), Algebraic threefolds, with special regard to problems of rationality, Ergebnisse der Mathematik und ihrer Grenzgebiete (N.F.), Heft 6, Berlin, New York: Springer-Verlag, MR 0076426
- Semple, J. G.; Roth, L. (1985), Introduction to algebraic geometry, Oxford Science Publications, The Clarendon Press Oxford University Press, MR 814690
- O'Connor, John J.; Robertson, Edmund F., "Leonard Roth", MacTutor History of Mathematics archive, University of St Andrews.
- Segre, Beniamino (1976), "Leonard Roth", The Bulletin of the London Mathematical Society 8 (2): 194–202, doi:10.1112/blms/8.2.194, ISSN 0024-6093, MR 0398747
- Togliatti, E. (1970), "Leonard Roth", Bollettino dell'Unione Matematica Italiana (4) 3: 326–332, MR 0260551