Lebesgue Integral: Comparison with Riemann

This lecture discusses the comparison between Lebesgue and Riemann integrals, showing that when the Riemann integral exists, it is the same as the Lebesgue integral. The instructor explains the concept through various examples and theorems, such as Fubini's theorem and the Tonelli theorem. The lecture also covers the practical application of exchanging the order of integration and computing integrals in different scenarios.