This video discusses the technique of placing pitch class sets into a generalized prime form in order to discuss their place inside of a set class. You should know about
Normal Order: https://youtu.be/6TEQ3i399iY and
Transpositional and Inversional Equivalence: https://youtu.be/SGp0GBnPpd0 first.
Schoenberg, Suite For Piano, Prelude: https://youtu.be/fy6t8yXPcSQ
Schoenberg, Suite For Piano, Gavotte: https://youtu.be/oqa1cw0PNOg