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Unequal

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

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Unequal

Written by: Eugenia Cheng
Narrated by: Eugenia Cheng
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About this listen
Read by the author.

At first glance, the concept of equality in maths seems unambiguous. When we see the equality sign, we think of 'solving for x' or balancing two sides of an equation or maybe even the many famous equations that make use of this elegant, innocuous symbol.

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But between those parallel lines lies a mathematical playground of choice and abstraction, leading to far greater insight than you could have dreamed. As it turns out, sameness and difference, equality and inequality, are not nearly as straightforward as they seem.

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Unequal explores the rich and rewarding interplay between sameness and difference, from numbers to manifolds to category theory and beyond in a glorious celebration of mathematics that will change the way you look at maths - and the world around you - forever.

This audiobook has been adapted for audio format. While all essential content is included and fully accessible through listening, a supplemental PDF is provided for additional reference. This material is not required to enjoy or understand the audiobook, but may offer helpful context or be of interest to listeners.©2025 Eugenia Cheng
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I liked the way Eugenia Cheng presented the concept of Category Theory to a novice. Highly recommend to those who want to explore the world of math.

Great Introduction to Category Theory

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