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What Is Mathematics, Really? Paperback – July 8, 1999

ISBN-13: 978-0195130874 ISBN-10: 0195130871

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What Is Mathematics, Really? + Sociocultural Research on Mathematics Education: An International Perspective + The Mathematical Experience
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Product Details

  • Paperback: 368 pages
  • Publisher: Oxford University Press (July 8, 1999)
  • Language: English
  • ISBN-10: 0195130871
  • ISBN-13: 978-0195130874
  • Product Dimensions: 9.2 x 6.1 x 1 inches
  • Shipping Weight: 1.4 pounds (View shipping rates and policies)
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (14 customer reviews)
  • Amazon Best Sellers Rank: #775,515 in Books (See Top 100 in Books)

Editorial Reviews

Amazon.com Review

In What Is Mathematics, Really?, author Reuben Hersh proposes a philosophy of mathematics that he calls "humanism" and uses this philosophy to analyze age-old questions of proof, certainty, and invention versus discovery. He also surveys the history of the philosophy of math. Readers of all levels of mathematical experience will be stimulated by the fascinating and perspicacious discussions Hersh has to offer. --This text refers to an out of print or unavailable edition of this title.

From Library Journal

Hersh, mathematician and coauthor of The Mathematical Experience (1983), attempts to answer here the philosophical question, "What is mathematics?" Many practitioners think of themselves as "platonists," discovering truths about ideal, eternally existing, abstract objects. The principal alternative to this concept is the "formalist" notion that mathematics is a game in which theorems are developed logically, starting from a set of axioms chosen almost arbitrarily. Hersh's humanistic position is, in essence, that mathematics is what mathematicians do. This is hard to disagree with but does not really explain how the subject evolves. Many feel that all mathematics begins with real-world applications, from which we try to extract the common properties and thence create a universe of abstract objects that can reveal unexpected beauty. In this somewhat disjointed book, Hersh reviews the history of the philosophy of mathematics, discusses the major players, and convincingly sets forth his thesis while undermining those of the competitors. For academic collections.?Harold D. Shane, Baruch Coll., CUNY
Copyright 1997 Reed Business Information, Inc. --This text refers to an out of print or unavailable edition of this title.

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34 of 37 people found the following review helpful By Colin McLarty on January 4, 2001
Format: Paperback
The book offers the best kind of live, seriously thought out, philosophy of mathematics--in real contact with mathematical practice and teaching. Hersh writes from a deep love of mathematics and a deep concern to make it accessible to others, and for him both of those motivate philosophic reflection on the nature of mathematics.
Hersh notes that mathematics is a social enterprise. People may pursue it alone in their rooms, and even do the greatest thinking that way (as Andrew Wiles did some great thinking in near secrecy on the way to proving the Fermat theorem). But what they think about is not their sole creation (witness the many enthusiastic citations Wiles gives to what he owes others). What we call "proofs" in actual practice are not complete deductions in formal logic, nor simply "whatever persuades you". They are reasonings that live up to a socially recognized standard.
Hersh believes, and argues, that students who understand the social nature of mathematics will approach it with more interest and less fear than those who think it is inhuman perfection. Actually, I think he is wrong about that. Students today generally believe literature is a social product, but they still too often think that "getting it" is an arcane and uninteresting skill of English teachers. But Hersh's view deserves careful consideration and you can learn from him whether you agree in the end or not.
I will also say that Hersh's descriptions of earlier philosophies of mathematics are not always historically very accurate. And though he has genuine concern to give sympathetic accounts of them (before giving his own refutation) he does not always succeed. But neither are his versions notably worse than the versions in other similar books.
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18 of 20 people found the following review helpful By David Knapp on April 15, 2008
Format: Paperback
Brint Montgomery is spot-on calling this "a choppy rough draft," but I'd say s/he gives it one star too many.

Hersh wanders through the landscape of ideas about math without much of a plan: he visits some regions so often the reader loses patience, while wholly ignoring others. He harps to the point of total tedium on his not-very-exciting notion of mathematics as a social undertaking, without really examining what that implies. Are we to think the idea "two" for * * is some sort of social construct? I'll bet anything Australopithecus was hard-wired to know the difference between one lion and two. Anyway, does counting up to five really belong in the same category with group theory? Hersh just assumes so, leaving a whole slew of fascinating questions out of his purview.

But Hersh writes clearly, if sometimes a bit too cutely, covers a lot of ground, and has some fascinating proofs and explanations in the back of the book. I'd be happy to have bought it just for the explanation and short proof of Gödel's Incompleteness Theorem. Bottom line: glad I bought it, hope something a lot better comes along soon.
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Format: Hardcover
Since the time of Plato, a major area of discussion within mathematics has been over whether mathematicians create or discover new mathematics. Those who favor the discovery side believe that mathematical objects and concepts already exist in some abstract book of knowledge and the discoverer simply turned to the right page in the book. On the other side are people who believe that the mathematical objects and concepts have no independent pre-existence and appear for the first time in any form when a mathematician expresses them. Of course, with any two widely disparate positions, there are many people who take a middle ground. Some have invoked the "mind of God" as the location of the pre-existence, yet invocation of a deity is not necessary to argue the pre-existence position.
Hersh puts forward complete descriptions of both these positions and then lists the mathematical principals who have put forward arguments on one side or the other. It is a list of most of the significant figures in the history of mathematics, which is an indication of how dynamic the field has been. Some of the major discoveries in mathematics have been counter-intuitive and led to alterations in the very foundations of mathematics.
This is not a book that can easily be digested by the non-mathematician. To understand how significant a new discovery was, it is necessary to have a solid grasp of the mathematics. For example, the consequences and significance of Georg Cantor's discovery that there are different levels of infinity cannot be understood without knowing how mathematicians struggled with the concept for centuries.
This book would make an excellent text for an upper-level course in the philosophy of mathematics and is engaging reading for all practicing mathematicians. It does all people working in any field good to take time out on occasion to study exactly what that field is and how it relates to the world.
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11 of 15 people found the following review helpful By Zeldock on December 27, 2007
Format: Paperback Verified Purchase
First, I need to disclose that I'm not a mathematician or a philosopher. I'm a lawyer with an interest in jurisprudence (philosophy of law) and the nature of legal reasoning.

"What Is Mathematics, Really?" is one of the most though-provoking books I've ever read. It has helped me to make progress on jurisprudential problems that I had formerly been attacking in largely fruitless ways.

The book thus filled a particular need for me. But I think anyone interested in intellectual history or the placing of math in context with other fields will find this book fascinating.
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