107,06 zł

Four Colors Suffice - Robin Wilson

Książki & Multimedia > Książki

Opis - On October 23, 1852, Professor Augustus De Morgan wrote a letter to a colleague, unaware that he was launching one of the most famous mathematical conundrums in history--one that would confound thousands of puzzlers for more than a century. This is the amazing story of how the "map problem" was solved. The problem posed in the letter came from a former student: What is the least possible number of colors needed to fill in any map (real or invented) so that neighboring counties are always colored differently? This deceptively simple question was of minimal interest to cartographers, who saw little need to limit how many colors they used. But the problem set off a frenzy among professional mathematicians and amateur problem solvers, among them Lewis Carroll, an astronomer, a botanist, an obsessive golfer, the Bishop of London, a man who set his watch only once a year, a California traffic cop, and a bridegroom who spent his honeymoon coloring maps. In their pursuit of the solution, mathematicians painted maps on doughnuts and horseshoes and played with patterned soccer balls and the great rhombicuboctahedron. It would be more than one hundred years (and countless colored maps) later before the result was finally established. Even then, difficult questions remained, and the intricate solution--which involved no fewer than 1,200 hours of computer time--was greeted with as much dismay as enthusiasm. Providing a clear and elegant explanation of the problem and the proof, Robin Wilson tells how a seemingly innocuous question baffled great minds and stimulated exciting mathematics with far-flung applications. This is the entertaining story of those who failed to prove, and those who ultimately did prove, that four colors do indeed suffice to color any map. This new edition features many color illustrations. It also includes a new foreword by Ian Stewart on the importance of the map problem and how it was solved. Nazwa - Four Colors Suffice Autor - Robin Wilson Oprawa - Miękka Wydawca - Princeton University Press Kod ISBN - 9780691158228 Kod EAN - 9780691158228 Rok wydania - 2013 Język - angielski Format - 15.5x23.5cm Ilość stron - 200 Podatek VAT - 5%

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51,54 zł

Otherwise Engaged Penguin USA

Książki / Literatura obcojęzyczna

The New York Times bestseller!§§Quick...has outdone herself with the 19th-century protagonist of Otherwise Engaged ."The Seattle Times §§Miss Amity Doncaster, world traveler, is accustomed to adventure and risk. Benedict Stanbridge, a man of science and a spy for the Crown, has faced danger in the darker corners of foreign lands.§§Now they are about to face a threat that is shockingly close to home...§§One does not expect to be kidnapped on a London street in broad daylight. Yet Amity Doncaster barely escapes with her life after she is trapped in a carriage with the killer known in the press as the Bridegroom. He is unwholesomely obsessed by her scandalous connection to Benedict Stanbridge gossip about their hours alone in a ship's stateroom seems to have crossed the Atlantic faster than any sailing vessel could. Benedict refuses to let this resourceful, daring woman suffer for her romantic link to him as tenuous as it may be.§§For a man and woman so skilled at disappearing, so at home in the exotic reaches of the globe, escape is always an option. But each intends to end the Bridegroom's reign of terror in London. And as they join forces and prepare to confront an unbalanced criminal in the heart of the city they love, they must also face feelings that neither can run from...§

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