This e-book arose from classes given at a world summer time tuition prepared via the quantity idea team of the dep. of arithmetic on the collage of Würzburg. It includes 4 primarily self-contained chapters and offers fresh examine effects highlighting the robust interaction among quantity conception and different fields of arithmetic, corresponding to combinatorics, practical research and graph idea. The booklet is addressed to undergraduate scholars who desire to observe a number of facets of quantity conception. Remarkably, it demonstrates how simply you possibly can strategy frontiers of present study in quantity thought by way of simple and easy analytic equipment. Kathrin Bringmann supplies an advent to the speculation of modular kinds and, specifically, so-called Mock theta-functions, a subject matter which have been untouched for many years yet has bought a lot awareness within the final years. Yann Bugeaud is worried with expansions of algebraic numbers. the following combinatorics on phrases and transcendence thought are mixed to derive new info at the series of decimals of algebraic numbers and on their persisted fraction expansions. Titus Hilberdink reviews on a contemporary and relatively unforeseen method of severe values of the Riemann zeta-function via use of (multiplicative) Toeplitz matrices and practical research. eventually, Jürgen Sander offers an creation to algebraic graph idea and the influence of quantity theoretical tools on primary questions about the spectra of graphs and the analogue of the Riemann speculation. A booklet of the ecu Mathematical Society (EMS). dispensed in the Americas by means of the yank Mathematical Society.

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