Product Description

For a thousand years, infinity has proven to be a difficult and illuminating challenge for mathematicians and theologians. It certainly is the strangest idea that humans have ever thought. Where did it come from and what is it telling us about our Universe? Can there actually be infinities? Is matter infinitely divisible into ever-smaller pieces? But infinity is also the place where things happen that don't. All manner of strange paradoxes and fantasies characterize an infinite universe. If our Universe is infinite then an infinite number of exact copies of you are, at this very moment, reading an identical sentence on an identical planet somewhere else in the Universe.

Now Infinity is the darling of cutting edge research, the measuring stick used by physicists, cosmologists, and mathematicians to determine the accuracy of their theories. From the paradox of Zeno’s arrow to string theory, Cambridge professor John Barrow takes us on a grand tour of this most elusive of ideas and describes with clarifying subtlety how this subject has shaped, and continues to shape, our very sense of the world in which we live. The Infinite Book is a thoroughly entertaining and completely accessible account of the biggest subject of them all–infinity.

Product Details

• Amazon Sales Rank: #407597 in Books
• Published on: 2006-09-12
• Released on: 2006-09-12
• Original language: English
• Number of items: 1
• Binding: Paperback
• 352 pages

From Booklist
As prolific science writer and physicist Barrow regularly remarks, infinity is not merely the smallest or biggest thing, or the longest time imaginable: it's a quality that is unimaginable. It's thus a paradox that mathematicians, physicists, and philosophers have discovered quite a bit about infinity, albeit with different degrees of certitude. As also related in David Foster Wallace's Everything and More: A Compact History of Infinity (2003), Barrow recounts the career of German mathematician Georg Cantor, whose explorations of set theory resulted in fundamental proofs about infinities (some are bigger than others, for example). However joyous such discoveries are to the numbers masters, physicists' encounters with infinities are less rapturous because they hint at deficiencies in general relativity; hence their joy over string theory, which eliminates infinities that arise in calculations about the big bang and black holes. Performing with his customary fluency and accessibility, Barrow imparts for general readers a feeling for the nub of thought about the mathematical, cosmic, ethical, and theological implications of infinity. Gilbert Taylor
Copyright © American Library Association. All rights reserved

Review
“Highly engaging. . . . [Barrow] brings his charm and wit to bear. . . . [He] introduces novel twists and turns, and presents [the] material in refreshing ways.”–Nature

"Eloquent. . . . Succinct. . . . Barrow [has the] remarkable ability to provide clear, concise, engaging and distinctly finite explanations–even when describing some fairly advanced concepts. . . . [An] engaging read."–San Francisco Chronicle

"Clever and insightful. . . . [A] lively history of infinity through the ages."–Entertainment Weekly

“Entertaining. . . . Remarkably lucid and not the least mind-boggling. . . . His clear, engaging style manages to illuminate abstruse matters.... This is a useful guide to an endlessly fascinating subject.” –American Scientist


From the Trade Paperback edition.

Review
“Highly engaging. . . . [Barrow] brings his charm and wit to bear. . . . [He] introduces novel twists and turns, and presents [the] material in refreshing ways.”–Nature

"Eloquent. . . . Succinct. . . . Barrow [has the] remarkable ability to provide clear, concise, engaging and distinctly finite explanations–even when describing some fairly advanced concepts. . . . [An] engaging read."–San Francisco Chronicle

"Clever and insightful. . . . [A] lively history of infinity through the ages."–Entertainment Weekly

“Entertaining. . . . Remarkably lucid and not the least mind-boggling. . . . His clear, engaging style manages to illuminate abstruse matters.... This is a useful guide to an endlessly fascinating subject.” –American Scientist

Customer Reviews

A Broad Look at Infinity
When we get the capacity to look closer and closer into molecules, atoms, and subatomic particles, will we always be able to find something smaller? When our telescopes or probes look deeper into space, will we always find something larger? Is there a limit to the shortness of an instant, or the duration of eternity? In _The Infinite Book: A Short Guide to the Boundless, Timeless, and Endless_, John D. Barrow has invited us to look at infinities in many ways. He's competent to do so, as a professor of mathematical sciences at Cambridge, and as the author of previous books which successfully explained such concepts as nothing or impossibility. Like his previous efforts, this is highly readable stuff, but extraordinarily mysterious. The topic is something that everyone has pondered in some way; who has not, looking into the stars, wondered how far they go? It has a universal appeal, and a history within religion, philosophy, mathematics, and physics, all of which Barrow goes into here, in an entertaining summary. There are answers here, but plenty of mysteries.

Consider a universe that is infinite in space; this is a possibility, for no one knows that space is not infinite. In a universe of infinite size anything that can happen does happen, and does so infinitely often. In such a universe, not only are you here, but somewhere out there is another you doing exactly what you are doing; in fact, there are an infinite number of you. There is also somewhere out there another you who has done everything you ever did, but on the day after his sixteenth birthday, wore black socks instead of brown. This has to be the case in an infinite universe, Barrow shows; it is enough to make us uncomfortable, but discomfort is not an argument that an infinite universe cannot exist. Mathematicians have had fun and frustration with infinity ever since Zeno, who "proved" that because to walk a mile, you first had to walk a half mile, and then a quarter mile more, and an eighth mile more after that, and so on forever, that you never were able to finish that mile, and if you are under the impression that you have accomplished a mile journey at some time, you are just deluded. The world as it perceived by us, with all its journeys, is an illusion. Georg Cantor solved the problems of dealing with infinities mathematically, but his work was viciously attacked and blocked from publication, but surprisingly, Catholic theologians welcomed his ideas as a way of understanding the infinite, the infinite that included God, of course. Today, mathematicians take Cantor's work for granted, and its religious implications are not the common stuff of sermons.

It is a pleasure to puzzle through these matters with Barrow as a guide, at least partially because this is a general overview which skims through details in order to provide a larger picture. String theory, for instance, takes a couple of pages, and cosmology not much longer. If one flavor of infinity is just too much for you to consider, another will soon present itself. Thus Barrow is able to give an accessible guide to such mathematical chestnuts as the Hotel Infinity, which although it has an infinite number of rooms and they are all occupied, can take on new guests, even an infinite number of guests, even if it has to take occupants when an infinite number of the other inns in the Hotel Infinity chain are closed. There is an examination of why the sky is dark at night, if the stars are infinite in number and there must be one out there no matter where you look. Barrow demonstrates that non-zero interest rates are evidence that time travel does not happen. He speculates about computers which could do an infinite number of tasks in a finite time; such computers might exist, and might be able to calculate the infinite digits of pi - but then how would you print it out? He shows that although we think of infinity sometimes as the biggest of numbers, infinity is not a big number, but something entirely different, and no big number ever provided such a degree of interest and research in so many fields. And as in so many of his discussions of aspects of the infinite, paradox always holds sway. We are still at the beginning of trying to find the answers to much of the material here. After all, as Barrow points out, "You can discover whether the Universe is infinite, but the learning will take an infinite time."

World without end--AMEN!
The value of "The Infinite Book" is definitely summed up in the chapter "The Madness of Georg Cantor." Believe it or not, "new math", that strange evolution of math teaching that stumped homework for a generation in the 60's was a direct result of Cantor's theories about sets, and the supposition that some infinite sets could be larger than others--which is the first thing you REALLY learn about infinity in mathematics.

The other great part of this book is the coupling of mathematics theory with physics. The assertion by Einstein that a singularity would be a breakdown of the laws of physics, and that any theory involving singularities would thereby have in it, the "seeds of its own destruction." Then author Barrow moves on to a very good explanation of string theory (imagine a particle that stretches like a tube in a warm enviroment, but contracts to a single point in a cool environment.) The explanations, illustrations are so clearly written in this book. It's a valuable reference for students of physics and mathematics and a great read for the curious about these subjects. Recommended.

Infinitely Great Book
The infinite is one of those concepts that takes just a bit of understanding. Well, maybe more than just a bit. Infinity doesn't necessarily mean a bunch, it means, mathematically, that a number cannot be determined.

Infinity is not a new idea. Mathematicians have been working on them for hundreds of years. Physicists really got involved when Einstein published the Theory of Relativity in 1905. He talked about all kinds of things happening when you approached the speed of light. Then when you actually got to the speed of light his equations went to infinity. This was a bit disconcerting. One of the real reasons for the willingness of physicists to believe in string theory is that that the equations still show valid values at and above the speed of light.

But enough on infinity. If you want to know more, here's the book for you. It discusses just about everything there is to know about infinity. It would be great for the high school math/physics teacher to use for examples. Or, it's just plain fun reading to anyone that's interested.