Автор: Richard Courant, Herbert Robbins
Издательство: Oxford University Press
Год издания: 1996
isbn: 0195105192
Количество страниц: 591
Язык: english
Формат: DJVU
For more than two thousand years a familiarity with mathematics has been regarded as an indispensable part of the intellectual equipment of every cultured person. Today, unfortunately, the traditional place of mathematics in education is in grave danger. The teaching and learning of mathematics has degenerated into the realm of rote memorization, the outcome of which leads to satisfactory formal ability but does not lead to real understanding or to greater intellectual independence. This new edition of Richard Courant's and Herbert Robbins's classic work seeks to address this problem. Its goal is to put the meaning back into mathematics. Written for beginners and scholars, for students and teachers, for philosophers and engineers, What is Mathematics?, Second Edition is a sparkling collection of mathematical gems that offers an entertaining and accessible portrait of the mathematical world. Covering everything from natural numbers and the number system to geometrical constructions and projective geometry, from topology and calculus to matters of principle and the Continuum Hypothesis, this fascinating survey allows readers to delve into mathematics as an organic whole rather than an empty drill in problem solving. With chapters largely independent of one another and sections that lead upward from basic to more advanced discussions, readers can easily pick and choose areas of particular interest without impairing their understanding of subsequent parts. Brought up to date with a new chapter by Ian Stewart, What is Mathematics?, Second Edition offers new insights into recent mathematical developments and describes proofs of the Four-Color Theorem and Fermat's Last Theorem, problems that were still open when Courant and Robbins wrote this masterpiece, but ones that have since been solved. Formal mathematics is like spelling and grammar--a matter of the correct application of local rules. Meaningful mathematics is like journalism--it tells an interesting story. But unlike some journalism, the story has to be true. The best mathematics is like literature--it brings a story to life before your eyes and involves you in it, intellectually and emotionally. What is Mathematics is like a fine piece of literature--it opens a window onto the world of mathematics for anyone interested to view.
Автор: Martin Gardner
Издательство: Clarkson N. Potter
Год издания: 1981
isbn: 051754380X, 0517543818
Количество страниц: 156
Язык: english
Формат: PDF (scan)
There are 36 puzzles. Each begins with a one or two paragraph "story" which is "kind-of" Sci-Fi. The story describes a situation or event. And then one or more questions are posed. In the answer section for many of them, an additional question is posed on the same "story." So each initial puzzle has up to three variations with solutions.
Автор: N. M Christie
Издательство: CEF Books
Год издания: 1998
isbn: 1896979122
Количество страниц: 50
Язык: english
Формат: PDF (scan)
More than any other battle, Passchendaele illustrates the horror and the futility that characterized the First World War. It was fought in a sea of mud where men attacked in unfathomable conditions for reasons which are difficult to grasp. Throughout the three and one-half months of the battle, the soldiers of the British Empire struggled as much against the thick, waist-deep mud as they did against the determined German defenders.
Автор: David Bullock, Peter Sarson
Издательство: Osprey Publishing
Год издания: 2006
isbn: 1841765457
Количество страниц: 51
Язык: english
Формат: PDF (scan)
By 1920 the Red Army fielded an overwhelming array of armored cars and armored trains, while tank detachments had begun forming in earnest. These armored units played an important part in consolidating the newly won Bolshevik empire in the early 1920s; as a consequence of the fact that railways were the strategic arteries that essentially controlled Russia, armored trains have never played such a significant role in military history as they did in the Russian Civil War. This title details their management, construction and repair, personnel and training and combat on all fronts, as well as discussing Trotsky's armored train, in which he conducted 36 tours.
Автор: David Bullock, Andrei Aksenov
Издательство: Osprey Publishing
Год издания: 2003
isbn: 1841765449
Количество страниц: 51
Язык: english
Формат: PDF (scan)
One of the most important conflicts of the 20th century, the Russian Civil War was the struggle that led to the formation of the Soviet Union. Following the overthrow of the Russian Provisional Government on 7 November 1917, the All-Russian Congress of Soviets met and handed over power to the Soviet Council of People's Commissars. Immediately forces began to assemble in opposition to the Bolshevik regime, and these became known as the Whites. This title examines the armour that they had at their disposal throughout the course of the war. It was a varied collection including British and French vehicles and, perhaps most famously, the armoured trains that enabled the Whites to dominate much of Siberia.
Автор: Mana Takahashi, Shoko Azuma
Издательство: No Starch Press
Год издания: 2009
isbn: 1593271905
Количество страниц: 212
Язык: english
Формат: PDF (scan)
Want to learn about databases without the tedium? With its unique combination of Japanese-style comics and serious educational content, The Manga Guide to Databases is just the book for you. Princess Ruruna is stressed out. With the king and queen away, she has to manage the Kingdom of Kod's humongous fruit-selling empire. Overseas departments, scads of inventory, conflicting prices, and so many customers! It's all such a confusing mess. But a mysterious book and a helpful fairy promise to solve her organizational problems-with the practical magic of databases. In The Manga Guide to Databases, Tico the fairy teaches the Princess how to simplify her data management. We follow along as they design a relational database, understand the entity-relationship model, perform basic database operations, and delve into more advanced topics. Once the Princess is familiar with transactions and basic SQL statements, she can keep her data timely and accurate for the entire kingdom. Finally, Tico explains ways to make the database more efficient and secure, and they discuss methods for concurrency and replication. Examples and exercises (with answer keys) help you learn, and an appendix of frequently used SQL statements gives the tools you need to create and maintain full-featured databases. (Of course, it wouldn't be a royal kingdom without some drama, so read on to find out who gets the girl-the arrogant prince or the humble servant.) This EduManga book is a translation of a bestselling series in Japan, co-published with Ohmsha, Ltd., of Tokyo, Japan.
Автор: Martin Gardner
Издательство: University Of Chicago Press
Год издания: 1991
isbn: 0226282562
Количество страниц: 262
Язык: english
Формат: PDF (scan)
Seasoned with Gardner's interest in the history and philosophy of science, this delightful book is a treasure-trove of puzzles, anecdotes, games, and logical theory. These intriguing problems, collected from Gardner's Scientific American columns, involve knots, interlocking rings, rotations and reflections, logical paradox, two-dimensional universes, chess strategies, and gambling odds". Gardner conjures problems that are both profound and silly; exquisite truths and outrageous absurdities; paradoxes, anagrams, palindromes and party tricks. . . . He knows, better than most, how many amazing true things there are in the world".
Автор: Jerry Pallotta, Rob Bolster
Издательство: Cartwheel
Год издания: 2001
isbn: 0439154308
Количество страниц: 33
Язык: english
Формат: PDF (scan)
What better way to introduce the concept of percentages than with delicious Twizzlers candy? As he's done with fractions, addition, and counting, author and educator Jerry Pallotta teaches percentages in the fun and relaxed way that has become his trademark.
Автор: Reginald H. Roy
Издательство: CEF Books
Год издания: 2001
isbn: 1896979386
Количество страниц: 50
Язык: english
Формат: PDF (scan)
"There have been only a handful of days since the beginning of time on which the direction the world was taking has been changed for the better in one twenty-four hour period by an act of man. June 6, 1944 was one of them. What the Americans, British and Canadians were trying to do was get back a whole continent that had been taken from its rightful owners and whose citizens had been taken captive by Adolf Hitler's German army. It was one of the most monumentally unselfish things one group of people ever did for another. " Andy A. Rooney, Private, United States Army.
Автор: Dale Clarke, Brian Delf
Издательство: Osprey Publishing
Год издания: 2004
isbn: 1841766887
Количество страниц: 51
Язык: english
Формат: PDF (scan)
In 1914 the artillery of Britain's 'Field Army' encompassed those weapons judged to have sufficient mobility to keep up with troops in the field. This book describes all major variants, from the 60-pdr guns of the heavy field batteries, perched somewhat uncomfortably on the cusp between field artillery and siege artillery, to the 2.75in. guns of the mountain batteries, almost toy-like in comparison. Between these two extremes lay the bulk of the artillery of the Field Army: the 13-pdr guns of the Royal Horse Artillery, and the 18-pdr guns and 4.5in. howitzers of the Royal Field Artillery batteries.
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