03032nam a22004095i 450000100090000000300080000900500170001700700030003400800410003701000170007802000300009502000270012502000270015203500130017904000230019204100080021504200080022305000230023110000360025424500770029026400400036730000500040733600260045733700280048333800270051150000980053850503480063652012850098465000450226965000250231465000360233965000460237590600450242194200120246699900190247895201250249724021762BJBSDDR20260501105944.0ta250206s2025    nyu           000 0 eng    a  2025931930  a9781541606555 (hardcover)  a1541606558 (hardcover)  z9781541606562q(ebook)  a24021762  aDLCbengerdacDLC  aeng  apcc14aQA 8.4bC518u 20251 aCheng, Eugenia, d1976- 94811110aUnequal :bthe math of when things do and don't add up /cEugenia Cheng. 1aNew York, NY :bBasic Books,c2025.  a386 pages : billustrations, charts ; c25 cm  atextbtxt2rdacontent  aunmediatedbn2rdamedia  avolumebnc2rdacarrier  a"Originally published in May 2025 by Profile Books in the United Kingdom" -- Title page verso0 aWhen 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.  a"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"--cProvided by publisher. 4aFilosofía de las matemáticas 914507 4aAritmética 914462 4aNotación matemática 914511 4aMatemáticas xAspectos sociales 948249  a0bibccorignewd2eepcnf20gy-gencatlg  2lcccBK  c126913d126913  00102lcc40708HUaBJBbBJBcHUd2026-04-24l0oQA 8.4 C518u 2025p00000199709r2026-04-24 10:44:00t1w2026-04-24yBK