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)
myarray = [a,b,c,d,e,f,g]the notationmyarray[2:4]would return the subarray which starts at and includes the second entry and ends at but doesn't include the fourth entry, in this casemyarray[2:4]returns[c,d](arrays start counting from 0). If a colon appears without anything to the left or right of it, it is unbounded in that direction, for examplemyarray[3:]returns[d,e,f,g]. At a glance it appears as though a similar meaning might be intended here. – JMoravitz Jan 26 '19 at 00:28