Tanguy Rivoal

Last updated
Tanguy Rivoal
Born1972
France
Alma mater
Known for Riemann zeta function
Scientific career
Fields Mathematics
Institutions
Thesis Propriétés diophantiennes de la fonction zêta de Riemann aux entiers impairs  (2001)
Doctoral advisor Francesco Amoroso

Tanguy Rivoal (born 1972) [1] is a French mathematician specializing in number theory and related fields. He is known for his work on transcendental numbers, special functions, and Diophantine approximation. He currently holds the position of Directeur de recherche (Research Director) at the Centre National de la Recherche Scientifique (CNRS) and is affiliated with the Université Grenoble Alpes. [2]

Contents

Education

Rivoal obtained his Ph.D. from the Université de Caen Normandie in 2001 under the supervision of Francesco Amoroso. His dissertation was titled Propriétés diophantiennes de la fonction zêta de Riemann aux entiers impairs (Diophantine properties of the Riemann zeta function at odd integers). [3]

Research

Rivoal's research focuses on several areas of mathematics, including Diophantine approximation, Padé approximation, arithmetic Gevrey series, values of the Gamma function, transcendental number theory, and E-function. His notable contributions include the proof that there is at least one irrational number among nine numbers ζ(5), ζ(7), ζ(9), ζ(11), ..., ζ(21), where ζ is the Riemann zeta function. [4]

Together with Keith Ball, Rivoal proved that an infinite number of values of ζ at odd integers are linearly independent over , for which he was elected an Honorary Fellow of the Hardy-Ramanujan Society. [5] [6] They also proved that there exists an odd number j such that 1, ζ(3), and ζ(j) are linear independent over where 2 < j < 170, a specific case of the more general folklore conjecture stating that π, ζ(3), ζ(5), ζ(7), ζ(9), ..., are algebraically independent over , which is a consequence of Grothendieck's period conjecture for mixed Tate motives. [7] [8] [9]

See also

Related Research Articles

<span class="mw-page-title-main">Riemann zeta function</span> Analytic function in mathematics

The Riemann zeta function or Euler–Riemann zeta function, denoted by the Greek letter ζ (zeta), is a mathematical function of a complex variable defined as for , and its analytic continuation elsewhere.

<span class="mw-page-title-main">Euler's constant</span> Constant value used in mathematics

Euler's constant is a mathematical constant, usually denoted by the lowercase Greek letter gamma, defined as the limiting difference between the harmonic series and the natural logarithm, denoted here by log:

In mathematics, the Weil conjectures were highly influential proposals by André Weil. They led to a successful multi-decade program to prove them, in which many leading researchers developed the framework of modern algebraic geometry and number theory.

<span class="mw-page-title-main">Analytic number theory</span> Exploring properties of the integers with complex analysis

In mathematics, analytic number theory is a branch of number theory that uses methods from mathematical analysis to solve problems about the integers. It is often said to have begun with Peter Gustav Lejeune Dirichlet's 1837 introduction of Dirichlet L-functions to give the first proof of Dirichlet's theorem on arithmetic progressions. It is well known for its results on prime numbers and additive number theory.

<span class="mw-page-title-main">Liouville's theorem (complex analysis)</span> Theorem in complex analysis

In complex analysis, Liouville's theorem, named after Joseph Liouville, states that every bounded entire function must be constant. That is, every holomorphic function for which there exists a positive number such that for all is constant. Equivalently, non-constant holomorphic functions on have unbounded images.

The theory of functions of several complex variables is the branch of mathematics dealing with functions defined on the complex coordinate space, that is, n-tuples of complex numbers. The name of the field dealing with the properties of these functions is called several complex variables, which the Mathematics Subject Classification has as a top-level heading.

The Basel problem is a problem in mathematical analysis with relevance to number theory, concerning an infinite sum of inverse squares. It was first posed by Pietro Mengoli in 1650 and solved by Leonhard Euler in 1734, and read on 5 December 1735 in The Saint Petersburg Academy of Sciences. Since the problem had withstood the attacks of the leading mathematicians of the day, Euler's solution brought him immediate fame when he was twenty-eight. Euler generalised the problem considerably, and his ideas were taken up more than a century later by Bernhard Riemann in his seminal 1859 paper "On the Number of Primes Less Than a Given Magnitude", in which he defined his zeta function and proved its basic properties. The problem is named after the city of Basel, hometown of Euler as well as of the Bernoulli family who unsuccessfully attacked the problem.

In mathematics, the Dedekind zeta function of an algebraic number field K, generally denoted ζK(s), is a generalization of the Riemann zeta function (which is obtained in the case where K is the field of rational numbers Q). It can be defined as a Dirichlet series, it has an Euler product expansion, it satisfies a functional equation, it has an analytic continuation to a meromorphic function on the complex plane C with only a simple pole at s = 1, and its values encode arithmetic data of K. The extended Riemann hypothesis states that if ζK(s) = 0 and 0 < Re(s) < 1, then Re(s) = 1/2.

In mathematics, the Hasse–Weil zeta function attached to an algebraic variety V defined over an algebraic number field K is a meromorphic function on the complex plane defined in terms of the number of points on the variety after reducing modulo each prime number p. It is a global L-function defined as an Euler product of local zeta functions.

Roger Apéry (French:[apeʁi]; 14 November 1916, Rouen – 18 December 1994, Caen) was a French mathematician most remembered for Apéry's theorem, which states that ζ(3) is an irrational number. Here, ζ(s) denotes the Riemann zeta function.

In mathematics, Apéry's theorem is a result in number theory that states the Apéry's constant ζ(3) is irrational. That is, the number

<span class="mw-page-title-main">Selberg class</span> Axiomatic definition of a class of L-functions

In mathematics, the Selberg class is an axiomatic definition of a class of L-functions. The members of the class are Dirichlet series which obey four axioms that seem to capture the essential properties satisfied by most functions that are commonly called L-functions or zeta functions. Although the exact nature of the class is conjectural, the hope is that the definition of the class will lead to a classification of its contents and an elucidation of its properties, including insight into their relationship to automorphic forms and the Riemann hypothesis. The class was defined by Atle Selberg in, who preferred not to use the word "axiom" that later authors have employed.

<span class="mw-page-title-main">Dirichlet beta function</span>

In mathematics, the Dirichlet beta function is a special function, closely related to the Riemann zeta function. It is a particular Dirichlet L-function, the L-function for the alternating character of period four.

In mathematics, Apéry's constant is the infinite sum of the reciprocals of the positive integers, cubed. That is, it is defined as the number

In mathematics, the Riemann zeta function is a function in complex analysis, which is also important in number theory. It is often denoted and is named after the mathematician Bernhard Riemann. When the argument is a real number greater than one, the zeta function satisfies the equation It can therefore provide the sum of various convergent infinite series, such as Explicit or numerically efficient formulae exist for at integer arguments, all of which have real values, including this example. This article lists these formulae, together with tables of values. It also includes derivatives and some series composed of the zeta function at integer arguments.

In mathematics, a Kloosterman sum is a particular kind of exponential sum. They are named for the Dutch mathematician Hendrik Kloosterman, who introduced them in 1926 when he adapted the Hardy–Littlewood circle method to tackle a problem involving positive definite diagonal quadratic forms in four variables, strengthening his 1924 dissertation research on five or more variables.

<span class="mw-page-title-main">Wadim Zudilin</span> Russian number theorist

Wadim Zudilin is a Russian mathematician and number theorist who is active in studying hypergeometric functions and zeta constants. He studied under Yuri V. Nesterenko and worked at Moscow State University, the Steklov Institute of Mathematics, the Max Planck Institute for Mathematics and the University of Newcastle, Australia. He now works at the Radboud University Nijmegen, the Netherlands.

In mathematics, Arakelov theory is an approach to Diophantine geometry, named for Suren Arakelov. It is used to study Diophantine equations in higher dimensions.

<span class="mw-page-title-main">Pierre Colmez</span> French mathematician

Pierre Colmez is a French mathematician and directeur de recherche at the CNRS (IMJ-PRG) known for his work in number theory and p-adic analysis.

In mathematics, the arithmetic zeta function is a zeta function associated with a scheme of finite type over integers. The arithmetic zeta function generalizes the Riemann zeta function and Dedekind zeta function to higher dimensions. The arithmetic zeta function is one of the most-fundamental objects of number theory.

References

  1. "Rivoal, Tanguy (1972-....)".
  2. "Tanguy Rivoal - Directeur de recherche au CNRS" . Retrieved 2024-11-19.
  3. Rivoal, Tanguy (29 June 2001). HAL these - Propriétés diophantiennes de la fonction zêta de Riemann aux entiers impairs (Thesis). Université de Caen.
  4. T. Rivoal (2002). "Irrationalité d'au moins un des neuf nombres ζ(5), ζ(7),…, ζ(21)". Acta Arithmetica . 103 (2): 157–167. arXiv: math/0104221 . doi:10.4064/aa103-2-5.
  5. K. Ball; T. Rivoal (2001). "Irrationalité d'une infinité de valeurs de la fonction zêta aux entiers impairs". Inventiones Mathematicae . 146 (1): 193–207. Bibcode:2001InMat.146..193B. doi:10.1007/s002220100168.
  6. "Announcements - Hardy-Ramanujan Journal" (PDF).
  7. Stéphane Fischler; Johannes Sprang; Wadim Zudilin (2019). "Many odd zeta values are irrational". Compositio Mathematica . 155 (5): 938–952. arXiv: 1803.08905 . doi:10.1112/S0010437X1900722X.
  8. Jean-Benoît Bost; François Charles (2016). "Some remarks concerning the Grothendieck period conjecture" (PDF). Journal für die reine und angewandte Mathematik . 2016 (714): 175–208. doi:10.1515/crelle-2014-0025.
  9. Joseph Ayoub [in German] (2014). "Periods and the conjectures of Grothendieck and Kontsevich-Zagier" (PDF). European Mathematical Society Newsletter (91): 12–18.