Hi. Currently I'm taking an advanced particle physics course, and apparently Einstein notation takes up a lot in this course. Unfortunately for me, and several others in this course, we have never had anything with this kind of notation before. And pretty much from day one, we were put right into it. I've asked my teacher, but he said: "Read Wikipedia" and solve this problem, which is as hard as it get in this course, and then you should understand Einstein notation. And yes, I probably will if I'm able to solve the problem, but with pretty much no basics regarding Einstein notation, it's really hard getting started, as you could imagine. So my request here is, if anybody had some notes on Einstein notation, maybe with some problems/examples included, that could really teach me how the Einstein notation works ? I have tried searching for it online, but I none of what I found was any good in my opinion. So yes, anybody who can help ? Thanks in advance.