Comment les peuples qui ne connaissent pas les mathématiques font-ils pour compter ? Pourquoi y a-t-il davantage de morts par noyade lorsqu'un film avec Nicolas Cage sort sur les écrans ? Peut-on contester une amende pour excès de vitesse grâce aux mathématiques ? Il y a plusieurs milliers d'années, les habitants de la Mésopotamie utilisaient des chiffres pour la première fois. Dès lors, rien n'a pu arrêter les mathématiques. De nos jours, elles sont partout : des sondages électoraux aux régulateurs de vitesse, des machines à café aux plans de métro sans oublier les nombreux algorithmes que nous utilisons sans nous en rendre compte quand nous regardons Netflix ou faisons une recherche sur Internet. Si nous n'avons pas besoin d'effectuer nous-mêmes les calculs requis par ces outils, il n'en est pas moins capital de comprendre leur fonctionnement pour mieux les maîtriser. C'est ce que nous explique Stefan Buijsman, mathématicien prodige, en combinant histoire, philosophie et vulgarisation. Avec humour et clarté, il dévoile à quel point les mathématiques influencent concrètement notre vie quotidienne. Un café avec Archimède raconte un monde insoupçonné et fascinant, bien loin des leçons rébarbatives apprises sur les bancs de l'école. Stefan Buijsman est né en 1995. Après avoir obtenu un master en philosophie à l'âge de 18 ans, il a achevé son doctorat en seulement un an et demi. Il étudie actuellement la philosophie des mathématiques. Un café avec Archimède est son premier ouvrage.

"Méthode d'apprentissage du français pour anglophones.

Semidefinite and conic optimization is a major and thriving research area within the optimization community. Although semidefinite optimization has been studied (under different names) since at least the 1940s, its importance grew immensely during the 1990s after polynomial-time interior-point methods for linear optimization were extended to solve semidefinite optimization problems. Since the beginning of the 21st century, not only has research into semidefinite and conic optimization continued unabated, but also a fruitful interaction has developed with algebraic geometry through the close connections between semidefinite matrices and polynomial optimization. This has brought about important new results and led to an even higher level of research activity. This Handbook on Semidefinite, Conic and Polynomial Optimization provides the reader with a snapshot of the state-of-the-art in the growing and mutually enriching areas of semidefinite optimization, conic optimization, and polynomial optimization. It contains a compendium of the recent research activity that has taken place in these thrilling areas, and will appeal to doctoral students, young graduates, and experienced researchers alike. The Handbook’s thirty-one chapters are organized into four parts: Theory, covering significant theoretical developments as well as the interactions between conic optimization and polynomial optimization; Algorithms, documenting the directions of current algorithmic development; Software, providing an overview of the state-of-the-art; Applications, dealing with the application areas where semidefinite and conic optimization has made a significant impact in recent years.

The bestselling author of The Trouble with Goats and Sheep delivers a suspenseful and emotionally satisfying novel “infused with warmth and humor” (People) about a lifelong friendship, a devastating secret, and the small acts of kindness that bring people together. There are three things you should know about Elsie. The first thing is that she’s my best friend. The second is that she always knows what to say to make me feel better. And the third thing…might take a bit more explaining. Eighty-four-year-old Florence has fallen in her flat at Cherry Tree Home for the Elderly. As she waits to be rescued, she thinks about her friend Elsie and wonders if a terrible secret from their past is about to come to light. If the charming new resident is who he claims to be, why does he look exactly like a man who died sixty years ago? From the acclaimed, bestselling author of The Trouble with Goats and Sheep, Three Things About Elsie “breathes with suspense, providing along the way piercing, poetic descriptions, countless tiny mysteries, and breathtaking little reveals…a rich portrait of old age and friendship stretched over a fascinating frame” (Kirkus Reviews, starred review). This is an “amusing and heartbreaking” (Publishers Weekly) story about forever friends on the twisting path of life who come to understand how the fine threads of humanity connect us all.

"This book covers the basic topics in geometry (including trigonometry) that are accessible and valuable to senior high school and university students. It also includes materials that are very useful for problem solving in mathematical competitions, from relatively easy to advanced levels, including the International Mathematical Olympiad."-

Where did math come from? Who thought up all those algebra symbols, and why? What is the story behind π π? … negative numbers? … the metric system? … quadratic equations? … sine and cosine? … logs? The 30 independent historical sketches in Math through the Ages answer these questions and many others in an informal, easygoing style that is accessible to teachers, students, and anyone who is curious about the history of mathematical ideas. Each sketch includes Questions and Projects to help you learn more about its topic and to see how the main ideas fit into the bigger picture of history. The 30 short stories are preceded by a 58-page bird's-eye overview of the entire panorama of mathematical history, a whirlwind tour of the most important people, events, and trends that shaped the mathematics we know today. “What to Read Next” and reading suggestions after each sketch provide starting points for readers who want to learn more. This book is ideal for a broad spectrum of audiences, including students in history of mathematics courses at the late high school or early college level, pre-service and in-service teachers, and anyone who just wants to know a little more about the origins of mathematics.