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Search for Wieferich Primes through the use of Periodic Binary Strings

Dobeš, Jan, Kureš, Miroslav (2010)

Serdica Journal of Computing

The result of the distributed computing projectWieferich@Home is presented: the binary periodic numbers of bit pseudo-length j ≤ 3500 obtained by replication of a bit string of bit pseudo-length k ≤ 24 and increased by one are Wieferich primes only for the cases of 1092 or 3510.

Searching for Diophantine quintuples

Mihai Cipu, Tim Trudgian (2016)

Acta Arithmetica

We consider Diophantine quintuples a, b, c, d, e. These are sets of positive integers, the product of any two elements of which is one less than a perfect square. It is conjectured that there are no Diophantine quintuples; we improve on current estimates to show that there are at most 5 . 441 · 10 26 Diophantine quintuples.

Secant tree calculus

Dominique Foata, Guo-Niu Han (2014)

Open Mathematics

A true Tree Calculus is being developed to make a joint study of the two statistics “eoc” (end of minimal chain) and “pom” (parent of maximum leaf) on the set of secant trees. Their joint distribution restricted to the set {eoc-pom ≤ 1} is shown to satisfy two partial difference equation systems, to be symmetric and to be expressed in the form of an explicit three-variable generating function.

Second moments of Dirichlet L -functions weighted by Kloosterman sums

Tingting Wang (2012)

Czechoslovak Mathematical Journal

For the general modulo q 3 and a general multiplicative character χ modulo q , the upper bound estimate of | S ( m , n , 1 , χ , q ) | is a very complex and difficult problem. In most cases, the Weil type bound for | S ( m , n , 1 , χ , q ) | is valid, but there are some counterexamples. Although the value distribution of | S ( m , n , 1 , χ , q ) | is very complicated, it also exhibits many good distribution properties in some number theory problems. The main purpose of this paper is using the estimate for k -th Kloosterman sums and analytic method to study the asymptotic properties...

Sekiguchi-Suwa theory revisited

Ariane Mézard, Matthieu Romagny, Dajano Tossici (2014)

Journal de Théorie des Nombres de Bordeaux

We present an account of the construction by S. Sekiguchi and N. Suwa of a cyclic isogeny of affine smooth group schemes unifying the Kummer and Artin-Schreier-Witt isogenies. We complete the construction over an arbitrary base ring. We extend the statements of some results in a form adapted to a further investigation of the models of the group schemes of roots of unity.

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