000 02273nam a22002777a 4500
999 _c58597
_d58597
005 20211115145717.0
008 211115b ||||| |||| 00| 0 eng d
020 _a9789386279828
028 _a:Variety Books Publishers & Distributors
_b;B-10 Street No 2 West Vinod Nagar Delhi 110092
_c:IM2892
_d;02/11/2021
082 _a512.73 QUE
100 _aQueffélec, Hervé
245 _aDiophantine approximation and Dirichlet Series
_c/ Hervé Queffélec & Martine Queffélec
260 _aNew Delhi, India
_b: Hindustan Book Agency
_c, 2013.
300 _axii, 232 pages
_c24cm.
365 _b670
490 _aTexts and Reading in Mathematics
520 _aThis self-contained book will benefit beginners as well as researchers. It is devoted to Diophantine approximation, the analytic theory of Dirichlet series, and some connections between these two domains, which often occur through the Kronecker approximation theorem. Accordingly, the book is divided into seven chapters, the first three of which present tools from commutative harmonic analysis, including a sharp form of the uncertainty principle, ergodic theory and Diophantine approximation to be used in the sequel. A presentation of continued fraction expansions, including the mixing property of the Gauss map, is given. Chapters four and five present the general theory of Dirichlet series, with classes of examples connected to continued fractions, the famous Bohr point of view, and then the use of random Dirichlet series to produce non-trivial extremal examples, including sharp forms of the Bohnenblust-Hille theorem. Chapter six deals with Hardy-Dirichlet spaces, which are new and useful Banach spaces of analytic functions in a half-plane. Finally, chapter seven presents the Bagchi-Voronin universality theorems, for the zeta function, and r-tuples of L functions. The proofs, which mix hilbertian geometry, complex and harmonic analysis, and ergodic theory, are a very good illustration of the material studied earlier.
650 _aMathematics
650 _aAlgebra
650 _a512 Algebra
650 _aDiophantine approximation -- Mathematical models.
650 _aDirichlet series.
700 _aQueffélec, Hervé
700 _aQueffélec Martine
942 _cMDL