An awesome lecture indeed! Studied elementary differential equations at University 40 years ago. About two weeks of lectures to present the same materail. Linear algebra clarifies the process very well. The  information relayed here conveys the cumulative effort of my lifetime  study and concentration..as a hobby....yet some students will soak this up  in minutes...work problems for a couple of weeks and have it down.....Awesome!!!!####[['lecture', 'Course_General_Feedback', 'POS'], ['Linear algebra', 'Mathematical_Related_Concept', 'POS']]