What does “$:[$” mean in $q_{(i,d,j)} ≜ P(S_{[t+1:t+d]}=j;|S_{[t+1:[}=j)$?












1












$begingroup$


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)










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  • $begingroup$
    Possibly related might be notation borrowed from computer programming... given an array, myarray = [a,b,c,d,e,f,g] the notation myarray[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 case myarray[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 example myarray[3:] returns [d,e,f,g]. At a glance it appears as though a similar meaning might be intended here.
    $endgroup$
    – JMoravitz
    Jan 26 at 0:28
















1












$begingroup$


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)










share|cite|improve this question











$endgroup$












  • $begingroup$
    Possibly related might be notation borrowed from computer programming... given an array, myarray = [a,b,c,d,e,f,g] the notation myarray[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 case myarray[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 example myarray[3:] returns [d,e,f,g]. At a glance it appears as though a similar meaning might be intended here.
    $endgroup$
    – JMoravitz
    Jan 26 at 0:28














1












1








1





$begingroup$


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)










share|cite|improve this question











$endgroup$




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)







notation






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Jan 26 at 0:31









Blue

49.1k870156




49.1k870156










asked Jan 25 at 23:12









squirvelsquirvel

61




61












  • $begingroup$
    Possibly related might be notation borrowed from computer programming... given an array, myarray = [a,b,c,d,e,f,g] the notation myarray[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 case myarray[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 example myarray[3:] returns [d,e,f,g]. At a glance it appears as though a similar meaning might be intended here.
    $endgroup$
    – JMoravitz
    Jan 26 at 0:28


















  • $begingroup$
    Possibly related might be notation borrowed from computer programming... given an array, myarray = [a,b,c,d,e,f,g] the notation myarray[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 case myarray[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 example myarray[3:] returns [d,e,f,g]. At a glance it appears as though a similar meaning might be intended here.
    $endgroup$
    – JMoravitz
    Jan 26 at 0:28
















$begingroup$
Possibly related might be notation borrowed from computer programming... given an array, myarray = [a,b,c,d,e,f,g] the notation myarray[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 case myarray[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 example myarray[3:] returns [d,e,f,g]. At a glance it appears as though a similar meaning might be intended here.
$endgroup$
– JMoravitz
Jan 26 at 0:28




$begingroup$
Possibly related might be notation borrowed from computer programming... given an array, myarray = [a,b,c,d,e,f,g] the notation myarray[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 case myarray[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 example myarray[3:] returns [d,e,f,g]. At a glance it appears as though a similar meaning might be intended here.
$endgroup$
– JMoravitz
Jan 26 at 0:28










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