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008			260424s2025 nyu||||| |||| 00| 0 eng d
020			_a9781541606555
020			_a1541606558
040			_bsap _cBJBSDDR
041			_aeng
050			_bC518 2025
100	1		_aCheng, Eugenia _948111
245	1	0	_aUnequal : _bthe math of when things do and don't add up / _cEugenia Cheng
250			_aFirst US edition
260			_aNew York : _bBasic Books, _c2025
300			_a386 pages : _billustrations ; _c25 cm
520			_aMath is famous for its equations: 1 + 1 = 2, a^2 + b^2 = c^2, or y = mx + b. Much of the time it can seem like that's all mathematics is: following steps to show that what's on one side of an equation is the same as what's on the other. In Unequal, Eugenia Cheng shows that's just part of the story, and the boring part to boot. Mathematics isn't only about showing how numbers and symbols are the same. It isn't even just about numbers and symbols at all, but a world of shapes, symmetries, logical ideas, and more. And in that world, the boundary between things being equal and unequal is a gray area, or perhaps a rainbow of beautiful, vibrant, subtly nuanced color. As Unequal shows, once you go over that rainbow, almost everything can be considered equal and unequal at the same time, whether it's shapes (seen from the right perspective, a circle is the same as an ellipse), words (synonyms), or people - even numbers! It all depends on what features we care about. And it's up to us what we do about it. That's because mathematics isn't a series of rules, facts, or answers. It's an invitation to a more powerful way of thinking
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