The Chua Lectures: From Memristors and Cellular Nonlinear Networks to the Edge of Chaos (In 4 Volumes): Volume IV. Local Activity Principle: Chua's Riddle, Turing Machine, and Universal Computing Rule 137 : World Scientific Publishing : 9789811215445 : 9811215448 : 06 Sep 2020 : This 4-volume compendium contains the verbatim hard copies of all color slides from the Chua Lecture Series presented at HP in Palo Alto, during the period from September 22 to November 24, 2015. Each lecture consists of 90 minutes, divided into a formal lecture, a discussion session, and an Encore of special trivia that the audience found mesmerizing. These lectures share some unique features of the classic Feynman Lectures on Physics, as much of the materials are presented in the unique style of the author, and the content is original as discovered or invented by the author himself. Unlike most technical books that suffer a notoriously short life span as their features could be superseded by superior models,