Explore a 26-minute lecture on Ulam's Problem 19 and related uniqueness problems in mathematics. Delivered by Dima Ryabogin from Kent State University at IPAM's Calculus of Variations in Probability and Geometry Workshop, this talk delves into the intricacies of Problem 19 from the Scottish book. Recorded on February 8, 2022, at the Institute for Pure & Applied Mathematics (IPAM) at UCLA, gain insights into this fascinating area of mathematical research. For more information on the workshop and its schedule, visit the IPAM website.