


NumberCrunching: 
How do technicians repair broken communications cables at the bottom of the ocean without actually seeing them? What's the likelihood of plucking a needle out of a haystack the size of the Earth? And is it possible to use computers to create a universal library of everything ever written or every photo ever taken? These are just some of the intriguing questions that bestselling popular math writer Paul Nahin tackles in NumberCrunching. Through brilliant math ideas and entertaining stories, Nahin demonstrates how odd and unusual math problems can be solved by bringing together basic physics ideas and today's powerful computers. Some of the outcomes discussed are so counterintuitive they will leave readers astonished. Nahin looks at how the art of numbercrunching has changed since the advent of computers, and how highspeed technology helps to solve fascinating conundrums such as the threebody, Monte Carlo, leapfrog, and gambler's ruin problems. Along the way, Nahin traverses topics that include algebra, trigonometry, geometry, calculus, number theory, differential equations, Fourier series, electronics, and computers in science fiction. He gives historical background for the problems presented, offers many examples and numerous challenges, supplies MATLAB codes for all the theories discussed, and includes detailed and complete solutions. Exploring the intimate relationship between mathematics, physics, and the tremendous power of modern computers, NumberCrunching will appeal to anyone interested in understanding how these three important fields join forces to solve today's thorniest puzzles. Paul J. Nahin is the author of many bestselling popular math books, including Mrs. Perkins's Electric Quilt, Digital Dice, Chases and Escapes, Dr. Euler's Fabulous Formula, When Least Is Best, and An Imaginary Tale (all Princeton). He is professor emeritus of electrical engineering at the University of New Hampshire. "Great stories. Interesting and challenging problems. Instructive MATLAB code. Lots of physics. That's my inanutshell assessment. . . . Nahin takes on the subject of using computers to solve difficult problems, many in physics, that couldn't be solved before computers. . . . This is one of those books that one can read as a spectator, enjoying the scenery, taking in the landscape, appreciating the rich storiesmy relationship with the bookor one can dive in, study the many equations, run the code, and have a personal experience of how problems that were unsolvable just a few decades ago have succumbed to computers."Sol Lederman, Wild About Math "Number Crunching is most timely, given the escalating scale of economic, commercial, and financial transactions, necessitating thinking about, evaluating, and communicating on a much larger scale. . . . The presentation in Number Crunching is simultaneously accessible, readable, entertaining, daunting, sophisticated, and technical."Stephen E. Roulac, New York Journal of Books "NumberCrunching is packed with copious notes and references and augmented by significant challenge problems that take the reader beyond the text and which would make good undergraduate projects. . . . Nahin's aim is clearly to convey enthusiasm for the subject to a younger reader and to give a glimpse of what is technically possible. . . . He looks to convey the excitement that he and many of us had when first attracted to the physical sciences as we were growing upthe excitement at the realisation that, given a few tools, even an awkward teenager can make quantitative statements about the world."C.J. Howls, Times Higher Education Other Princeton books authored or coauthored by Paul J. Nahin:
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