Koç University Mathematics Department Seminars

Solving several classical Diophantine equations via the Shimura-Taniyama conjecture
Benjamin Matschke
Université de Bordeaux, France
Özet : In this talk we present a project in which we constructed practical algorithms to solve S-unit, Mordell, cubic Thue, cubic Thue--Mahler, as well as generalized Ramanujan--Nagell equations, and to compute S-integral points on rational elliptic curves with given Mordell--Weil basis. Our algorithms rely on new height bounds, which we obtained using the method of Faltings (Arakelov, Parshin, Szpiro) combined with the Shimura--Taniyama conjecture (without relying on linear forms in logarithms), as well as several improved and new sieves. As one application we obtained a table of all rational elliptic curves with good reduction outside certain finite sets of primes, including the set {2, 3, 5, 7, 11}, and all sets whose product is at most 1000. In addition we used the resulting data to motivate several conjectures and questions, such as Baker's explicit abc-conjecture, and a new conjecture on the number of S-integral points of rational elliptic curves. This is joint work with Rafael von Känel.
  Tarih : 23.02.2017
  Saat : 16:00
  Yer : SCI 103
  Dil : English
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