. "Leonida Tonelli"@en . . "Tonelli, Leonida"@en . . . . . . "1946Z"^^ . . "1946-03-12Z"^^ . "1885-04-19Z"^^ . "Leonida Tonelli (19 April 1885 \u2013 12 March 1946) was an Italian mathematician, noted for creating Tonelli's theorem, a variation of Fubini's theorem, and for introducing semicontinuity methods as a common tool for the direct method in the calculus of variations."@en . . "Mathematician" . . "1885Z"^^ .