User blog comment:Wythagoras/All my stuff/@comment-7484840-20130708082913/@comment-10429372-20130708125410

Kappa is the first fixed point of I, e.g. theta(I_I_I...)

I_2 is the second fixed point of Omega, e.g. theta(Omega_Omega...Omega_(I+1)

I_3 is the third fixed point of Omega, e.g. theta(Omega_Omega...Omega_(I_2+1)

etc.