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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).

His sister was Queenie Roth, literary critic and wife of F.R. Leavis

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, MR0398747
Togliatti, E. (1970), "Leonard Roth", Bollettino dell'Unione Matematica Italiana (4) 3: 326–332, MR0260551

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