Математика - скачать книги или читать онлайн. Страница 54

A mind-bending excursion to the limits of science and mathematics Are some scientific problems insoluble? In Beyond Reason, internationally acclaimed math and science author A. K. Dewdney answers this question by examining eight insurmountable mathematical and scientific roadblocks that have stumped thinkers across the centuries, from ancient mathematical conundrums such as «squaring the circle,» first attempted by the Pythagoreans, to G?del's vexing theorem, from perpetual motion to the upredictable behavior of chaotic systems such as the weather. A. K. Dewdney, PhD (Ontario, Canada), was the author of Scientific American's «Computer Recreations» column for eight years. He has written several critically acclaimed popular math and science books, including A Mathematical Mystery Tour (0-471-40734-8); Yes, We Have No Neutrons (0-471-29586-8); and 200% of Nothing (0-471-14574-2).

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Если вы интересуетесь математикой и физикой и любите решать задачи, то вашим другом и помощником станет научно-популярный физико-математический журнал «КВАНТ». Он выходит с 1970 года и рассчитан на школьников старших классов и их учителей, а также на студентов младших курсов.

Если вы интересуетесь математикой и физикой и любите решать задачи, то вашим другом и помощником станет научно-популярный физико-математический журнал «КВАНТ». Он выходит с 1970 года и рассчитан на школьников старших классов и их учителей, а также на студентов младших курсов.

Выполненная на основе данных всероссийской переписи населения 2010 г. проверка законов Гибрата и Ципфа показала, что территориальное распределение населения в субъектах Приволжского федерального округа им не подчиняется. Во всех субъектах наблюдается существенный перекос в территориальном распределении населения: значительная его часть проживает в столицах, а половина населения субъекта – в нескольких крупных городах (от 1 до 10). При этом отсутствует какое‑либо существенное движение населения из одних субъектов в другие.

В статье предcтавлен оригинальный подход к оценке изменений в уровне жизни в период экономического кризиса, реализованный на основе рекурсивной системы совместных уравнений с использованием многомерной пробит-модели с учетом ненаблюдаемой индивидуальной гетерогенности, смещения из‑за пропущенных переменных и эндогенности. Зависимыми переменными уравнений системы являются двоичные переменные, фиксирующие финансовое поведение домохозяйств, изменения их позиции в распределении доходов, субъективные оценки таких изменений.

В работе выполняется множественное сравнение большого количества моделей GARCH, ARFIMA и HAR-RV семейств на данных по качеству одношагового прогноза реализованной волатильности на один день вперед. Сравнение проводится при помощи MCS теста на 10 российских биржевых активах, включая 8 акций и 2 биржевых индекса. Результаты говорят о явном преимуществе моделей семейства HAR-RV над семействами GARCH и ARFIMA и подтверждают обнаруженные в литературе результаты при сравнении отдельных представителей данных семейств.

Statistics For Dummies, 2nd Edition (9781119293521) was previously published as Statistics For Dummies, 2nd Edition (9780470911082). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. The fun and easy way to get down to business with statistics Stymied by statistics? No fear? this friendly guide offers clear, practical explanations of statistical ideas, techniques, formulas, and calculations, with lots of examples that show you how these concepts apply to your everyday life. Statistics For Dummies shows you how to interpret and critique graphs and charts, determine the odds with probability, guesstimate with confidence using confidence intervals, set up and carry out a hypothesis test, compute statistical formulas, and more. Tracks to a typical first semester statistics course Updated examples resonate with today's students Explanations mirror teaching methods and classroom protocol Packed with practical advice and real-world problems, Statistics For Dummies gives you everything you need to analyze and interpret data for improved classroom or on-the-job performance.

Whether you are returning to school, studying for an adult numeracy test, helping your kids with homework, or seeking the confidence that a firm maths foundation provides in everyday encounters, Basic Maths For Dummies, UK Edition, provides the content you need to improve your basic maths skills. Based upon the Adult Numeracy Core Curriculum, this title covers such topics as: Getting started with the building blocks of maths and setting yourself up for success Dealing with decimals, percentages and tackling fractions without fear Sizing Up weights, measures, and shapes How to handle statistics and gauge probability Filled with real-world examples and written by a PhD-level mathematician who specialises in tutoring adults and students, Basic Maths For Dummies also provides practical advice on overcoming maths anxiety and a host of tips, tricks, and memory aids that make learning maths (almost) painless – and even fun.

Algebra I For Dummies, 2nd Edition (9781119293576) was previously published as Algebra I For Dummies, 2nd Edition (9780470559642). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. Factor fearlessly, conquer the quadratic formula, and solve linear equations There's no doubt that algebra can be easy to some while extremely challenging to others. If you're vexed by variables, Algebra I For Dummies, 2nd Edition provides the plain-English, easy-to-follow guidance you need to get the right solution every time! Now with 25% new and revised content, this easy-to-understand reference not only explains algebra in terms you can understand, but it also gives you the necessary tools to solve complex problems with confidence. You'll understand how to factor fearlessly, conquer the quadratic formula, and solve linear equations. Includes revised and updated examples and practice problems Provides explanations and practical examples that mirror today's teaching methods Other titles by Sterling: Algebra II For Dummies and Algebra Workbook For Dummies Whether you're currently enrolled in a high school or college algebra course or are just looking to brush-up your skills, Algebra I For Dummies, 2nd Edition gives you friendly and comprehensible guidance on this often difficult-to-grasp subject.

The fun and easy way to learn pre-calculus Getting ready for calculus but still feel a bit confused? Have no fear. Pre-Calculus For Dummies is an un-intimidating, hands-on guide that walks you through all the essential topics, from absolute value and quadratic equations to logarithms and exponential functions to trig identities and matrix operations. With this guide's help you'll quickly and painlessly get a handle on all of the concepts – not just the number crunching – and understand how to perform all pre-calc tasks, from graphing to tackling proofs. You'll also get a new appreciation for how these concepts are used in the real world, and find out that getting a decent grade in pre-calc isn't as impossible as you thought. Updated with fresh example equations and detailed explanations Tracks to a typical pre-calculus class Serves as an excellent supplement to classroom learning If «the fun and easy way to learn pre-calc» seems like a contradiction, get ready for a wealth of surprises in Pre-Calculus For Dummies!

Just the critical concepts you need to score high in geometry This practical, friendly guide focuses on critical concepts taught in a typical geometry course, from the properties of triangles, parallelograms, circles, and cylinders, to the skills and strategies you need to write geometry proofs. Geometry Essentials For Dummies is perfect for cramming or doing homework, or as a reference for parents helping kids study for exams. Get down to the basics – get a handle on the basics of geometry, from lines, segments, and angles, to vertices, altitudes, and diagonals Conquer proofs with confidence – follow easy-to-grasp instructions for understanding the components of a formal geometry proof Take triangles in strides – learn how to take in a triangle's sides, analyze its angles, work through an SAS proof, and apply the Pythagorean Theorem Polish up on polygons – get the lowdown on quadrilaterals and other polygons: their angles, areas, properties, perimeters, and much more Open the book and find: Plain-English explanations of geometry terms Tips for tackling geometry proofs The seven members of the quadrilateral family Straight talk on circles Essential triangle formulas The lowdown on 3-D: spheres, cylinders, prisms, and pyramids Ten things to use as reasons in geometry proofs Learn to: Core concepts about the geometry of shapes and geometry proofs Critical theorems, postulates, and definitions The principles and formulas you need to know