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Étude d'un problème de continuité lié à l'hypothèse de Riemann

Nicolas Jousse (2005)

Annales de l’institut Fourier

Cet article est consacré à l’étude d’un problème lié au critère de Beurling Nyman sur l’hypothèse de Riemann. On y étudie la continuité de la projection de la fonction indicatrice de l’intervalle ] 0 , 1 ] sur un sous-espace vectoriel variable de l’ensemble des fonctions dont le carré est intégrable sur la demi-droite réelle, engendré par des fonctions dilatées de la fonction partie fractionnaire. Plus généralement, y étant un élément fixé d’un espace de Hilbert H , on étudie l’application qui à un convexe...

Flows of Mellin transforms with periodic integrator

Titus Hilberdink (2011)

Journal de Théorie des Nombres de Bordeaux

We study Mellin transforms N ^ ( s ) = 1 - x - s d N ( x ) for which N ( x ) - x is periodic with period 1 in order to investigate ‘flows’ of such functions to Riemann’s ζ ( s ) and the possibility of proving the Riemann Hypothesis with such an approach. We show that, excepting the trivial case where N ( x ) = x , the supremum of the real parts of the zeros of any such function is at least 1 2 .We investigate a particular flow of such functions { N λ ^ } λ 1 which converges locally uniformly to ζ ( s ) as λ 1 , and show that they exhibit features similar to ζ ( s ) . For example, N λ ^ ( s ) ...

Gaps between zeros of the derivative of the Riemann ξ -function

Hung Manh Bui (2010)

Journal de Théorie des Nombres de Bordeaux

Assuming the Riemann hypothesis, we investigate the distribution of gaps between the zeros of ξ ( s ) . We prove that a positive proportion of gaps are less than 0 . 796 times the average spacing and, in the other direction, a positive proportion of gaps are greater than 1 . 18 times the average spacing. We also exhibit the existence of infinitely many normalized gaps smaller (larger) than 0 . 7203 ( 1 . 5 , respectively).

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