Is the math here sloppy, or is it just me? Third equation they're bringing out B(i) and K(whatever).

I made it through multivariable calculus and grads and so forth, but the computer scientist in me gets upset when I run into undefined or poorly specified notation.

"Oh," someone will reply, "You didn't know that B(i) is the Frogglegoop function for ..." and I'll say, "Nope."

I rage quit denotational semantics after failing to find definitions of the hieroglyphs in two different textbooks. If you're going to bring greek and single letter function names to the game, you could at least provide a symbol table, eh?