about the forward porcess

[luang321]

I noticed that the forward process in this code is different from the original discrete diffusion, where it's defined as multiplication of doubly-stochastic matrices. So how is your forward process defined and how do you make sure that it'll converge to a known stationary distribution as t becomes larger? I'm bad at math so i'll be very thankful if you can just tell me how it works. thank you. ( ・ิω・ิ)