"Version: 20221201"--Title page verso.Includes bibliographical references.Page dedicated to Professor Allan D Boardman -- 1. Introductory chapter -- 1.1. Metamaterials : the discovery of 2000th -- 1.2. Characteristic features of the media and wave phenomena in metamaterials and the main approaches to their modeling -- 1.3. Purpose, tasks, and structure of the book2. Metamaterials with active me…