1
$\begingroup$

I'm trying to learn about glicko 2 rating system . In that document, there is a formula in step 5, point 2 that says $B = a - k\sqrt{\tau^2}$ Can anyone explain what is the point of squaring the tau, then getting its root again?

1 Answers 1

2

$\sqrt{\tau^2}=|\tau|$ $ { } $$ { } $$ { } $

  • 0
    Alright, thanks. I was worried that I missed something out, because the value of tau is supposed to be between 0.3 and 1.2, and they have used || to indicate absolute elsewhere.2012-10-05