Unknown Quantity: A Real and Imaginary History of Algebra

Unknown Quantity A Real and Imaginary History of Algebra For curious nonmathematicians and armchair algebra buffs John Derbyshire discovers the story behind the formulae roots and radicals As he did so masterfully in Prime Obsession Derbyshire brings th

  • Title: Unknown Quantity: A Real and Imaginary History of Algebra
  • Author: John Derbyshire
  • ISBN: 9780452288539
  • Page: 250
  • Format: Paperback
  • For curious nonmathematicians and armchair algebra buffs, John Derbyshire discovers the story behind the formulae, roots, and radicals As he did so masterfully in Prime Obsession, Derbyshire brings the evolution of mathematical thinking to dramatic life by focusing on the key historical players Unknown Quantity begins in the time of Abraham and Isaac and moves from Abel For curious nonmathematicians and armchair algebra buffs, John Derbyshire discovers the story behind the formulae, roots, and radicals As he did so masterfully in Prime Obsession, Derbyshire brings the evolution of mathematical thinking to dramatic life by focusing on the key historical players Unknown Quantity begins in the time of Abraham and Isaac and moves from Abel s proof to the higher levels of abstraction developed by Galois through modern day advances Derbyshire explains how a simple turn of thought from this plus this equals this to this plus what equals this gave birth to a whole new way of perceiving the world With a historian s narrative authority and a beloved teacher s clarity and passion, Derbyshire leads readers on an intellectually satisfying and pleasantly challenging journey through the development of abstract mathematical thought.
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      Published :2019-04-07T01:48:09+00:00

    873 Comment

    • Koen Crolla says:

      Though Derbyshire is a dimwitted douchenozzle on many, many subjects, he managed to write a decent book on algebra.My original review—before I realised this John Derbyshire was also John Derbyshire, the racist/homophobe/theotard/hypocrite/all-round dipshit who writes for the National Review—was going to mention how the book takes a naïve attitude towards history that's refreshing in this age of nuance and relative rigor (something that's only remotely acceptable because the book isn't about [...]

    • Jafar Isbarov says:

      According to , there are 13 branches of math, 6 of which fall into the realm of pure mathematics. Algebra is just one of these. So is there any merit in reading a book about history of this small corner of the mathematical universe? Of course, this is a large understatement on part of algebra – it definitely is not a “small corner” of math. On the contrary, it perhaps the largest and the most interconnected field of it. But it is still not whole of it, right? Why not go for some general ma [...]

    • Maurizio Codogno says:

      Nella matematica che si fa a scuola la geometria quanto quanto è comprensibile: le figure almeno le si vede. L'analisi matematica, con derivate e integrali, è appannaggio di pochi (s)fortunati. Ma quello che probabilmente fa odiare a tutti la matematica sono le equazioni e i polinomi; quello che viene chiamato algebra. Un libro come questo, che racconta la storia dell'algebra partendo dai babilonesi per arrivare al ventunesimo secolo, potrebbe essere visto come il fumo negli occhi. Non è cos [...]

    • Theresa Leone Davidson says:

      I have written before about my propensity in high school to avoid being challenged in math: once I became intimidated by the work, by 8th or 9th grade, I took the easy way out, never challenged myself, and did altogether poorly in the subject. However, in college I had brilliant professors in the math classes I was required to take and they inspired me to take more than was required and instilled in me a love of the beauty of numbers, formulas, equations, etc. Algebra has always been my favorite [...]

    • Jesse says:

      There's an inherent difficulty in writing a book of this kind; a significant portion of the material that the author is expected to cover is simply out of the range of readers that lack an extensive background in mathematics. It is, in fact, worse than physics, in which metaphors can be used to give the reader some inkling of what's going on, even if they don't completely understand the reasons behind it. That being said, Derbyshire does a worthy job at a devilishly difficult task. The first hal [...]

    • Adam says:

      Unknown Quantity is an interesting book about the history of algebra, but I think its major failing is that it concentrates sufficiently heavily on the mathematics that it's hard to read sections if you aren't already knowledgeable about them. It claims to be aimed at the non-mathematician, but even as someone who has good knowledge of algebra, there were portions of the book (such as the topology sections) that I got very little out of because I wasn't already familiar with the particular branc [...]

    • gargamelscat says:

      5/10The book falls between the stools of "popular math" and math treatments but is not rigorous enough to satisfy those interested in the latter and loses those drawn to the former in splurges of (incomplete) equations and hard to followOn the plus side the potted histories of the various mathematicians encountered are entertaining and the book is reasonably well written.It did serve the purpose of illustrating the arcane geography of modern algebra but didn't make me interested in it. Somewhat [...]

    • Nur says:

      "The story of algebra, is the story of civilization itself"I stumbled on this book somewhere at while searching for books to help me become a better TA in undergraduate Discrete Math class. The class is entirely in Japanese, so imagine studying sets and groups and lattices using symbols (read: kanji) you've never seen and had no clue on the reading and meaning.I need a good English textbook to keep me sane, and being a fiction-lover, I certainly hope this book could lift my mood in the attempts [...]

    • Jose Moa says:

      This book is another good work of John Derbyshire;the history of algebra from the babilonians to our days making things understable for those with a background of high school,it makes understable concepts as the complex numbers ,vector spaces ,quaternions ,algebraic structures as rings and gives a very elemental introduction to galois theory and algebraic topology

    • Jonathan Peto says:

      I reached Chapter 12. I noticed reviews by people with stronger backgrounds in math than I have and decided to abandon ship since they too lost focus during the last quarter.

    • Joe says:

      I like the history of mathematics [turns head away in shame, moist eyes brimming with hot tears of disgrace]

    • Rossdavidh says:

      Subtitle: A Real and Imaginary History of Algebra. This is, more or less, the story of how math got away from us. How it went from a way of counting clay casks of grain given as tribute in Mesopotamia, to a system for analyzing entities which have no physical existence, the nature of which cannot easily be explained, and the usefulness of which (while often, it is eventually discovered, quite substantial) is not apparent even to those who are working on it. It's basically the history of how math [...]

    • Natbas says:

      I am reading a book on Maths, I am about to finish it, and in this book, I found a superb passage:"I remain completely confident that the labor I have expended on the science presented here and which hasd emanded a significant part of my life as well as the most strenuous application of my powers, will not be lost. It is true that I am aware that the form which I have given the science is imperfect and must be imperfect. But I know and feel obliged to state (though I run the risk of seeming arro [...]

    • Mary Ronan Drew says:

      Unless you already know what Nine Zulu Queens Ruled China has to do with anything and solve the occasional recreational quadratic equation (as I confess I have been known to do from time to time), this book may not be for you. However, there are two approaches to this history of algebra. One is for those who are tickled to death with Edwin Abbott’s Flatland and know the significance of 1,1,2,3,5,8,13,21,34,55,89,144,233,377, . . . The other is for folks who would like to know which mathematici [...]

    • Bryan Higgs says:

      I've read a number of "Math for the layman" books in recent years (including this author's Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics, which I reviewed here a while back: /review/show/). This one covers a number of topics and history that I've seen covered in many of those other books.Surprisingly, I have found the history sections of these books often to be more interesting than the math sections -- I say surprisingly because I disliked history in high sc [...]

    • Nishant Pappireddi says:

      As someone who has already been exposed to many, if not most, of the ideas in this book, I was hoping that it would be more interesting to me than the usual popular math book. "Unknown Quantity" definitely exceeded my expectations on this. Though there were a couple of parts that annoyed me (e.g he defines a prime number in a ring as being one with no factors besides units and itself, which was especially bad because he was discussing a non-UFD, where "prime" and "irreducible" are not the same), [...]

    • Randy says:

      Derbyshire interweaves superficial biographic sketches of the mathematicians with superficial descriptions of their discoveries, alongside Will Durant-esque comments on the world political situation at the time.I found it very interesting. It will be more interesting for you if you have heard of Descartes, Gauss, Riemann and if you have a sense of what a function is, a matrix, a ring. You need not be able to manipulate them, but if you can visualize how they work, you will enjoy this book.The pr [...]

    • Erik says:

      Well played Mr. Derbyshire. This book *appears* to be a history book, but in fact is a gentle introduction to advanced abstract algebra. It focuses on concepts and patterns rather than slogging through proofs, which is by far the most enjoyable way to learn. Books about mathematics have to be careful about the amount of actual math they include, and this book is on the light side. Derbyshire navigates this well early, but in the later parts of the book I wished the ideas were anchored in actual [...]

    • AJ says:

      I'm not really sure who the author was considering as the audience for this book. It's too technical at times for a layperson (and even engineers with PhDs apparently) and not detailed enough for the mathematician. Sometimes it's more like a historical biography of mathematicians and other times more like a math textbook. Additionally, the author broke the 4th wall a lot, and while I don't mind when authors do that, he was kind of annoying. He'd interject to say how he loves drawing figures by h [...]

    • Erica says:

      10/21/07I checked this out at the library. Wanting to know more history about mathematics (because I have started doing this monthly thing with my students called the "Mathematician of the Month" where they research a famous mathematician that has had some influence over whatever unit they/we are currently learning), I thought this book by Mr. Derbyshire would be a good choiceOOORING. I did get some good tidbits out of it though. 1) Decartes invented the radical symbol for square roots. 2) Decar [...]

    • Marc Towersap says:

      I did enjoy this book, a bit of a slog, maybe took 2 months to get through it. I worked through much of the math to ensure I understood it. The history was quite interesting, I really enjoyed the way he walked from the beginning to what's going on today. Makes me want to revisit the stuff I learned but have forgotten! If you don't know much math, this book will be very very difficult to read. I had to recall as best I could what little I remember from my undergraduate physics classes to tackle t [...]

    • Theodosia of the Fathomless Hall says:

      It does suffer from the mathematical tendency to be analytic and without personality, but it familiarizes if not outright teaches a multitude of mathematical principles. There are math primers for each chapter of the history but one, and then there are the aforementioned history/concept chapters. Occasionally dry wit is added into the fray, with a healthy dose of originality and a fresh outlook. Certainly there are more userfriendly approaches to the discipline -- unless one is fluent in rings, [...]

    • Mattie says:

      A history of algebra. Because I'm just that kind of nerdy. I feel a little ambivalent in rating this book because I'm not sure I understood some of the math well enough to rate it. That said, any failure to follow the math was, I think, mine, not Derbyshire's.The sections of the book I liked most were when he tied the developments in the discipline to what was happening in the world at large. I just wish there had been more of this - more contextualization of parallel developments in art, scienc [...]

    • Tracy Black says:

      First, I have to say that as a non-mathematician, I had a terrible time with this. This algebra is not college freshman algebra. There were many topics I lacked a background in, and I spent much time digging through my husband's old math textbooks to gain enough understanding just to follow the book.It was worth it though. Derbyshire is witty and the book was well written and very interesting. Not quite as good as Prime Obsession, but the math was easier for me to follow in that one, so the it w [...]

    • Shu Lindsey says:

      "[E]very science, when we understand it not as an instrument of power and domination but as an adventure in knowledge pursued by our species across the ages, is nothing but this harmony, more or less vast, more or less rich from one epoch to another, which unfurls over the course of generations and centuries, by the delicate counterpoint of all the themes appearing in turn, as if summoned from the void."

    • Michael says:

      Okay, but not as good as "Prime Obsession". It can't seem to decide whether it wants to be a math book or a history book. As a result, it isn't very good at being either. For the math layman (as I am), the more abstract algebra later in the book requires more explanation/background than what the author provides, making it somewhat pointless to read.

    • Jessica says:

      This started out as a more interesting and less technical book on math history than others I have read, but got confusing and technical for the last third of the book or so. It was a good overview of the development of algebra and gave me a few interesting stories to tell my classes.

    • Tom says:

      I found it difficult to follow, especially since most of the book focuses on the biographies of obscure 18th century British mathematicians as opposed to the medieval fundamentals or interesting 20th century advancements, and it turns out that it's because the author is a raging white supremacist.

    • Alterstuart says:

      Bought this for my son to supplement his algebra MOOC, but ended up reading it myself. This book introduces you to some mind blowing ideas, and you don't have to be a human calculator in order to benefit from it.

    • Michael says:

      I have a feeling that I may start a few other books while reading this one. White it's not a "hard math" book, it's not exactly light reading either.

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