Question

What is this equation?

\[\theta = (X^TX)^{-1}X^Ty^{\rightarrow}\]

Answer 1

It's one of the equations I learned about in the machine learning public class

Answer 2

...nobody's my classmate :-(

Answer 3

some kind of regression formula?

Answer 4

yes!

Answer 5

w00t, quiztime, let me select a formula for you :)

Answer 6

oh dear :-(

Answer 7

\[\sum_{1}^{\infty} { 1 \over { n^s}}\]

Answer 8

its..... a harmonic series!

Answer 9

it's the most famous one of its kind, the Riemann zeta function

Answer 10

it's more complex than it looks :-(