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Imagining Numbers: Particularly the Square Root of Minus Fifteen
 
 

Imagining Numbers: Particularly the Square Root of Minus Fifteen (Hardcover)

by Barry Mazur (Author) "Picture Rodin's Thinker, crouched in mental effort ..." (more)
4.0 out of 5 stars  See all reviews (1 customer review)

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Product details

  • Hardcover: 288 pages
  • Publisher: Allen Lane (27 Mar 2003)
  • Language English
  • ISBN-10: 0713996307
  • ISBN-13: 978-0713996302
  • Product Dimensions: 20 x 13.6 x 3.2 cm
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon.co.uk Sales Rank: 187,531 in Books (See Bestsellers in Books)

    Popular in these categories:

    #22 in  Books > Science & Nature > History & Philosophy > Mathematics
    #23 in  Books > Scientific, Technical & Medical > Mathematics > Mathematical Theory > Philosophy of Mathematics
    #24 in  Books > Science & Nature > Mathematics > Philosophy of Mathematics
  • See Complete Table of Contents

Product Description

Review

Don't be put off by the subtitle - Particularly the Square Root of Minus Fifteen - because this book isn't just for lovers of mathematical conundrums. It deals with the imagination, or rather the processes of imagining. If we visualise the phrase 'the yellow of the tulip' we can see it effortlessly in our mind's eye, yet we have no experience of the process of imagining it. We take thinking and imagining for granted, the processes are so intimate and automatic for us. The author wants us to experience the imagining process, and to this end he gives this faculty something we are not sure about - 'when some new image or viewpoint is about to reveal itself to us, but it resists emerging, we are forced to angle for it'. Mazur proposes that the inner articulations of the imagining process can be experienced if we attempt to imagine a concept which, even when it was first proposed, seemed devilishly outlandish. This is where the square root of a negative number - a literal impossibility - comes in. With a book dealing in square roots, it is natural that the Latin roots of the word 'imagining' are explored, as are the ideas of poets, thinkers, philosophers and writers. Mazur likens imagination to the sense of smell where the aroma of fresh coffee somehow bypasses the act of smelling: we notice the coffee, not the intricate activity of smell receptors communicating to our brain. All the best mathematical problems are come-ons, the book says - there is a gentle irony behind them. Thus letting our imagination tinker with the concept of the square root of negative numbers should stimulate our imaginations in such a way that we can experience the process of imagining. This is a curious and fascinating book. It's not an easy read by any means because the whole idea is to set the reader a problem, the mental exploration of which will hopefully allow us to experience our mental cognitive processes at work. But it's well written and often humorous, and it shows our conscious and subconscious mental activities in a whole new light. (Kirkus UK)


Product Description

This is a book about the imagination in general and about the mathematical imagination in particular. Barry Mazur considers the range of our imaginative experiences. When we read a line of poetry - "The yellow of the tulip" - what is it we experience in the mind's eye? And when we imagine a number, in particular an impossible number such as the square root of a negative quantity, what imaginative object might this bring to mind?

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4 of 4 people found the following review helpful:
4.0 out of 5 stars Imaginative, 13 May 2007
As someone quite numerate I am not quite in the (stated) target demographic for this book. I am skeptical whether those of meagre mathematical comprehension would be persuaded to buy it. Which is a shame.

I found the book good overall, even though I felt a little cheated. I was expecting a more artistic interpretation of complex geometry, perhaps using cognitive psychology as a cypher; and, whilst there _were_ such passages, they were few and sporadic throughout the work (betraying the epistolary origins of the book). Despite this criticism, the book certainly gives an excellent grounding in the history and development of algebra, geometry and their eventual interactive agreement and inexorable production of the imaginary number system.

I really enjoyed the concluding chapter, too, as it plays to Mazur's strength as a mathematician and helped me confront a nagging irritation from when I first learnt imaginary numbers: that of the arbitrary nature of ascribing the complex plane ninety degrees counter-clockwise to the real. It is worth reading if only for the flashes of poetically-inspired descriptions of cognition, and this chapter, alone.

This book doesn't require a deep understanding of algebraic and geometric mathematics, nor previous experience with complex numbers, though I wonder how many people would read through the text if they struggle to understand the optional endnotes.
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