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A Computational Introduction to Number Theory and Algebra
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CC BY-NC-ND
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All of the mathematics required beyond basic calculus is developed “from scratch.” Moreover, the book generally alternates between “theory” and “applications”: one or two chapters on a particular set of purely mathematical concepts are followed by one or two chapters on algorithms and applications; the mathematics provides the theoretical underpinnings for the applications, while the applications both motivate and illustrate the mathematics. Of course, this dichotomy between theory and applications is not perfectly maintained: the chapters that focus mainly on applications include the development of some of the mathematics that is specific to a particular application, and very occasionally, some of the chapters that focus mainly on mathematics include a discussion of related algorithmic ideas as well.

The mathematical material covered includes the basics of number theory (including unique factorization, congruences, the distribution of primes, and quadratic reciprocity) and of abstract algebra (including groups, rings, fields, and vector spaces). It also includes an introduction to discrete probability theory—this material is needed to properly treat the topics of probabilistic algorithms and cryptographic applications. The treatment of all these topics is more or less standard, except that the text only deals with commutative structures (i.e., abelian groups and commutative rings with unity) — this is all that is really needed for the purposes of this text, and the theory of these structures is much simpler and more transparent than that of more general, non-commutative structures.

Subject:
Algebra
Mathematics
Material Type:
Textbook
Author:
Victor Shoup
Date Added:
01/01/2008
Introduction to Aerospace Structures and Materials
Conditional Remix & Share Permitted
CC BY-NC-SA
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This book provides an introduction to the discipline of aerospace structures and materials. It is the first book to date that includes all relevant aspects of this discipline within a single monologue. These aspects range from materials, manufacturing and processing techniques, to structures, design principles and structural performance, including aspects like durability and safety. With the purpose of introducing students into the basics of the entire discipline, the book presents the subjects broadly and loosely connected, adopting either a formal description or an informal walk around type of presentation. A key lessons conveyed within this book is the interplay between the exact science and engineering topics, like solid material physics and structural analysis, and the soft topics that are not easily captured by equations and formulas. Safety, manufacturability, availability and costing are some of these topics that are presented in this book to explain decisions and design solutions within this discipline.

Subject:
Applied Science
Engineering
Material Type:
Textbook
Author:
René Alderliesten
Date Added:
04/27/2020
OpenStax Principles of Macroeconomics 2e, The Macroeconomic Perspective, Measuring the Size of the Economy: Gross Domestic Product
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CC BY
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By the end of this section, you will be able to:

Identify the components of GDP on the demand side and on the supply side
Evaluate how economists measure gross domestic product (GDP)
Contrast and calculate GDP, net exports, and net national product

Subject:
Applied Science
Material Type:
Module
Date Added:
08/21/2018