Just speaking from my own expedience, I had advanced (jr year) mechanics before diff eq... but admittedly was taking it early. It was doable but tough.
Greens function were new to me in grad school. Grad school mechanics had be learning math I didn’t know before too... can’t recall what it was at the moment.
And then the advanced AMO class had some more math I hadn’t seen.
Greens function were new to me in grad school. Grad school mechanics had be learning math I didn’t know before too... can’t recall what it was at the moment.
And then the advanced AMO class had some more math I hadn’t seen.