I am reading through some math on a paper, and I am trying to properly understand some of the proofs / equations. In particular, $$q_{(i,d,j)} ≜ P(S_{[t+1:t+d]}=j|S_{[t+1:[}=j)$$ is fairly confusing to me.
I know that the function q is being defined as that following block, and so on, but I am getting lost at what :[ means. Does anyone know where to point me? Google comes up with nothing on this notation, though I am aware that [] is used to typically denote arrays / sets.
Paper in question is here (formula on page 5)