I remember the first time I saw \mathbb{R}^n. I thought "What the heck does that mean?!" I wish more time had been utilized in high school to explain all of t

I remember the first time I saw \mathbb{R}^n. I thought "What the heck does that mean?!" I wish more time had been utilized in high school to explain all of the notation that I would need to know later on. It's difficult to Google symbols. (More recently, I spent a few hours trying to figure what a box with a times symbol in it means — in the context of the paper I was reading, it turned out to be the outer tensor product of linear group representations. Who would have guessed that?)