Introduction to Perturbation Methods

This book embarks on a thorough review of Eastern and Western philosophies of propriety over the past 2,500 years, followed by an investigation of the ideas of propriety found in five key schools of economics: classical, neoclassical, institutional, behavioral, and cultural economics. The author then outlines the core principles and recommended practices for the study and implementation of propriety economics in the future. With its unique mixture of theory, literature reviews, methods, and case studies, this book will be useful not only to economic scholars, but also historians, policy makers, and any reader with an interest in making the economy work better for the benefit of all humankind.

This book is a self-contained introduction to the fundamental and interesting topics of geometry. The topics covered include the definitions and properties of 2D and 3D shapes, the basic concepts and formulas of perimeter, area and volume, the Pick’s formula, the Cavalieri’s principles, the basic geometric transformations, the concepts of tessellations, the Euler’s polyhedral formula, and the methods of construction of regular polygons and regular polyhedra. Complemented by diagrams, pictures, examples and exercises, the materials covered are suitable for an introductory course on geometry and will appeal to school students, teachers, junior undergraduate students, mathematics instructors or lecturers alike.