02962nam a22004095i 4500 24021762 BJBSDDR 20260501105944.0 ta 250206s2025 nyu 000 0 eng 2025931930 9781541606555 (hardcover) 1541606558 (hardcover) 9781541606562 (ebook) 24021762 DLC eng rda DLC eng pcc QA 8.4 C518u 2025 Cheng, Eugenia, 1976- 48111 Unequal : the math of when things do and don't add up / Eugenia Cheng. New York, NY : Basic Books, 2025. 386 pages : illustrations, charts ; 25 cm text txt rdacontent unmediated n rdamedia volume nc rdacarrier "Originally published in May 2025 by Profile Books in the United Kingdom" -- Title page verso When are things the same? -- Equations -- The stories hiding behind numbers -- Equality between functions -- Why the Earth could be a bagel -- Interchangeable lids and mathematical glue -- Logic, emotions, insight -- Sameness in category theory -- Sameness in branches of math -- From Sheffield to Buffalo -- More dimensions, more forgiveness. "Why the familiar equal sign isn't just a marker of sameness but a gateway into math's-and humanity's-most profound questions. Math is famous for its equations: 1 + 1 = 2, a2 + b2 = c2, 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 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"-- Provided by publisher. Filosofía de las matemáticas 14507 Aritmética 14462 Notación matemática 14511 Matemáticas Aspectos sociales 48249 0 ibc orignew 2 epcn 20 y-gencatlg lcc BK 126913 126913 0 0 lcc 0 0 HU BJB BJB HU 2026-04-24 0 QA 8.4 C518u 2025 00000199709 2026-04-24 10:44:00 1 2026-04-24 BK