Explore a comprehensive lecture on mathematical logic, focusing on unifications and diversifications, delivered by renowned expert Kazuyuki Tanaka. Delve into advanced topics such as second-order arithmetic and reverse mathematics, including Tanaka's embedding theorem for WKLo and the Tanaka formulas for conservation results. Gain insights from a distinguished scholar with a Ph.D. from U.C. Berkeley and extensive teaching experience at Tokyo Institute of Technology and Tohoku University. Learn about the latest developments in mathematical logic from a researcher who has supervised fifteen Ph.D. students and made significant contributions to the field.