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Multiplicity estimate for solutions of extended Ramanujan’s system

Evgeniy Zorin (2012)

Journal de Théorie des Nombres de Bordeaux

We establish a new multiplicity lemma for solutions of a differential system extending Ramanujan’s classical differential relations. This result can be useful in the study of arithmetic properties of values of Riemann zeta function at odd positive integers (Nesterenko, 2011).

On a mixed Littlewood conjecture for quadratic numbers

Bernard de Mathan (2005)

Journal de Théorie des Nombres de Bordeaux

We study a simultaneous diophantine problem related to Littlewood’s conjecture. Using known estimates for linear forms in p -adic logarithms, we prove that a previous result, concerning the particular case of quadratic numbers, is close to be the best possible.

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