Since the fork and join outcomes only allow a single derivation fragment to be initiated or integrated, each case of the active category model only nondeterministically modifies at most one a d t variable from the previous time step: 3 Decisions about the awaited categories b 1..D t also depend on the outcome of the fork and join variables.
again, since the fork and join outcomes only allow a single derivation fragment to be initiated or integrated, each case of the awaited category model only nondeterministically modifies at most one b d t variable from the previous time step: the parser has a fixed number of probabilistic decisions to make as it encounters each word, regardless of the depth of the stack.