arrow_back Subscripts: One of the faults of the computer code that I'm writing these pages in (called html) is that it can't handle superscripts and subscripts. That's one of the reasons I've relied so heavily on these little embedded images with the math in them, which take so long to appear.

Well, I'm really going to be using a lot of subscripts in this section, and I can't be embedding everything. So let's have the convention that x_n will stand in for