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Unequal: The Maths of When Things Do and Don’t Add Up

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Award-winning mathematician Eugenia Cheng offers a perspective-shifting exploration of how maths can change your mind

NEW SCIENTIST BOOK OF THE YEAR

'Clear, clever and friendly...even at her most whimsical, she is rigorous and insightful' ALEX BELLOS

'Eugenia Cheng has humour, grace and a natural gift' DANIEL LEVITIN

'Playful and deeply serious ... shows how exploring equality in maths may help the real world' NEW SCIENTIST

When we see an equals sign, we usually see something clear cut: problem on one side, solution on the other. We might need to shuffle some things around - balance the equation - to get there, but it's all pretty clear cut...isn't it?

As it turns out, between those parallel lines lies something far more exciting than questions and answers. An equals sign is an invitation to a mathematical playground of choice and abstraction. By opening your mind to different mathematical choices and perspectives, you can unlock far greater insight than you could have dreamed.

Eugenia Cheng explores the rich and rewarding interplay between sameness and difference, and offers us a new way to see the world based on the choices and interpretations we make. A glorious celebration of mathematics, Unequal will change the way you think - in maths, and in life.

Author: Cheng Eugenia
Publisher: PROFILE BOOKS
Pages: 400
ISBN: 9781805223078
Cover: Paperback
Edition Number: 1
Release Year: 2026
Eugenia Cheng is Scientist in Residence at the School of the Art Institute of Chicago and Honorary Fellow in pure mathematics at the University of Sheffield. She was educated at the University of Cambridge and did post-doctoral work at the Universities of Cambridge, Chicago and Nice. Since 2007 her YouTube lectures and videos have been viewed over a million times. A concert pianist, she also speaks French and Cantonese, and her mission in life is to rid the world of maths phobia. She is the author of The Art of Logic, How to Bake Pi and Beyond Infinity (all published by Profile Books), the last of which was shortlisted for the 2017 Royal Society Science Book Prize.

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