Explore symbolic dynamics for orbits with zero Lyapunov exponents in this comprehensive lecture by Snir Ben Ovadia from Weizman, Israel. Delve into key concepts including spacing reduction, temperability, and Lapierre's formula. Learn about the greedy algorithm and gap transformer, and examine specific examples of zero summable conditions. Understand the temperability rate of contraction and engage with thought-provoking questions in this in-depth presentation from the ICTP 2021 conference.