Reference for a class I took in college by Dr. Justin Wyss-Gallifent - https://www.math.umd.edu/~immortal/MATH241/ - https://youtube.com/playlist?list=PLV_e97dP47FE0KsQwaGYpRlQ1c2cv-eiI
Reference for a class I took in college by Dr. Justin Wyss-Gallifent - https://www.math.umd.edu/~immortal/MATH241/ - https://youtube.com/playlist?list=PLV_e97dP47FE0KsQwaGYpRlQ1c2cv-eiI