A one semester introductory course to infinite-dimensional differential geometry (Lie groups and Riemannian geometry) can be found here
https://youtube.com/playlist?list=PLwDBpozLuH8Pcto54ul5GM2LNJNIuc446
A one semester introductory course to infinite-dimensional differential geometry (Lie groups and Riemannian geometry) can be found here
https://youtube.com/playlist?list=PLwDBpozLuH8Pcto54ul5GM2LNJNIuc446