Leonard Roth

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Not to be confused with Klaus Roth.

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