Once Q is constructed, topic recovery requires O(KV 2 + K 2 V I), where K is the number of topics, V is the vocabulary size, and I is the average number of iterations (typically 100-1000).
traditional topic Anchor Top Words in Topics  backpack  backpack camera lens bag room carry fit  cameras equipment comfortable  camera  camera lens pictures canon digital lenses  batteries filter mm photos  bag  bag camera diaper lens bags genie smell  room diapers odor   Table 1: Three separate attempts to construct a topic concerning camera bags in Amazon product reviews with single word anchors.