Loading... The Man of Numbers: Fibonacci's Arithmetic Revolutionby Keith DevlinBooks Read in 2013 (471) Compact | Rate recommendations None. Loading...
Sign up for LibraryThing to find out whether you'll like this book. No current Talk conversations about this book. A slim volume, but well worth reading. Little is known about Leonardo of Pisa's life, but much more is now known of his legacy and the era in which he lived. It also gives a glimpse how mathematical notation changed and became even more symbolic since his time. This review was written for LibraryThing Early Reviewers. The Man of Numbers, by Keith Devlin, is an account of Leonardo of Pisa, better known as "Fibonacci". Leonardo is best known for the number sequence, the "Fibonacci Numbers", named after him. (1, 1, 2, 3, 5, 8, 13, 21, 34, ... Can you guess the pattern?) Far more important than this sequence, however, was Leonardo's introduction of the familiar Arabic numerals to Europe. These are the numbers (0, 1, 2, 3, 4, 5, 6,...) that we use now for nearly everything, and they replaced the older Roman numerals (I, II, III, IV, V, VI,...) that were in use in Europe prior to the thirteenth century. The unfortunate fact is that very little is known about Leonardo, apart from some of his writing. This makes his story rather difficult to tell, so Devlin makes up for the lack of hard data by describing life during Leonardo's time, and speculating intelligently about various aspects of his education, travels and motivations for his work. Most interestingly, he describes the tremendous impact the introduction of Arabic numerals had on Western culture, and the way ordinary calculation was so profoundly affected. Devlin has a well-earned reputation as a master of telling mathematical stories, and while I would not consider it his best work, this book does not disappoint on that score. This review was written for LibraryThing Early Reviewers. As a young man Leonardo of Pisa, aka Fibonacci, went into the family trading business, which required knowledge of arithmetic. Between the ages of 10 and 12 his parents sent him to a religious school to learn to read and write, and to learn the Roman system of arithmetic. In Pisa at the time, and throughout Europe in the late twelfth century, religious schools were the only schools, and only boys were accepted as students. Wax tablets were used for used for writing, and the reading board, a type of abacus, was used in arithmetic using the Roman system, and its Roman numerals. Many children today struggle to learn to add, subtract, multiply, divide, and take percentages. Think how much harder basic arithmetic was in Leonardo's time, using the Roman system of arithmetic. Leonardo's great contribution to the advancement of knowledge in the West was the introduction of the algorithms for basic arithmetic using the Hindu-Arabic system, with its ten place-valued digits. Sometime in the 1180's Leonardo's father took a diplomatic post in the Islamic port of Bugia on North Africa's Barbary Coast. Leonardo followed him there a year later, and during his stay learned the Hindu-Arabic system of arithmetic. In 1202 Leonardo completed the first edition of Liber Abbacci, a book that literally changed the Western World. No copies of this first edition survive, but three copies of the second edition, completed in 1228, still survive. Our current use of the Hindu-Arabic system for arithmetic in the West can be traced back directly to Liber Abbacci, and the multitude of later books more or less based on it. The mathematical content of this book, as little as there is, is interesting. But the historical content overwhelms the mathematical, and most of the book is about life in the twelfth and thirteenth century. I was looking to find more mathematics, but was not disappointed when I did not find it. Highly recommended for anyone interested in mathematics, or history, and especially for those interested in the history of mathematics. This review was written for LibraryThing Early Reviewers. In about the year of 1170 a man named Leonardo was born in Pisa. Opening a book he wrote in 1202 he referred to himself as Leonardo Pisano, Family Bonacci, from this Latin phrase filus Bonacci his present day nickname “Fibonacci” was coined by a historian in 1838. Fibonacci is usually remembered only in connection with the ‘Fibonacci sequence’ however, in this fine book Keith Devlin carefully outlines his role as a towering figure in the movement of Hindu-Arabic numerals and arithmetic from the southern Mediterranean into Italy where it spread into Europe. The system was known in Italy before Fibonacci was born but it had was little used and not seen as being of value. It was the achievement of Fibonacci in his books to describe the system in terms of the problems encountered by merchants. He provided page after page of problems that involved trade, the measurement of land, the division of profits and the exchange of one form of money for another. Each problem was carefully worked out with the problem described in the text and the numbers presented in red in the margin. Fibonacci had written the first practical math textbook and it was copied over and over again by other authors. With real world examples such as “On finding the worth of Florentine Rolls when the worth of those of Genoa is known” he had written the first book on the Hindu-Arabic system that had popular appeal. The type of book that we all use to learn basic arithmetic is the direct descendant of this type of writing. The story of the development of math and math learning is very well told in this most enjoyable book. It in no way requires a math background or skills to read and enjoy. I recommend it to anyone who likes a good story of how our world came to be. 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Amazon.com Product Description (ISBN 0802778127, Hardcover)In 1202, a 32-year old Italian finished one of the most influential books of all time, which introduced modern arithmetic to Western Europe. Devised in India in the 7th and 8th centuries and brought to North Africa by Muslim traders, the Hindu-Arabic system helped transform the West into the dominant force in science, technology, and commerce, leaving behind Muslim cultures which had long known it but had failed to see its potential. The young Italian, Leonardo of Pisa (better known today as Fibonacci), had learned the Hindu number system when he traveled to North Africa with his father, a customs agent. The book he created was Liber abbaci, the "Book of Calculation," and the revolution that followed its publication was enormous. Arithmetic made it possible for ordinary people to buy and sell goods, convert currencies, and keep accurate records of possessions more readily than ever before. Liber abbaci's publication led directly to large-scale international commerce and the scientific revolution of the Renaissance. Yet despite the ubiquity of his discoveries, Leonardo of Pisa remains an enigma. His name is best known today in association with an exercise in Liber abbaci whose solution gives rise to a sequence of numbers--the Fibonacci sequence--used by some to predict the rise and fall of financial markets, and evident in myriad biological structures. One of the great math popularizers of our time, Keith Devlin recreates the life and enduring legacy of an overlooked genius, and in the process makes clear how central numbers and mathematics are to our daily lives. (retrieved from Amazon Mon, 30 Sep 2013 13:46:50 -0400) "The untold story of Leonardo of Pisa, the medieval mathematician who introduced Arabic numbers to the West and helped launch the modern era."--P. [2] of dust jacket. |
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