Period doubling, information entropy, and estimates for Feigenbaums constants

The relationship between period doubling bifurcations and Feigenbaums constants has been studied for nearly 40 years and this relationship has helped uncover many fundamental aspects of universal scaling across multiple nonlinear dynamical systems. This paper will combine information entropy with symbolic dynamics to demonstrate how period doubling can be defined using these tools alone. In addition, the technique allows us to uncover some unexpected, simple estimates for Feigenbaums constants which relate them to log 2 and the golden ratio, phi, as well as to each other.