6. The method of claim 1 , wherein the edges of the social network graph are weighted differently for at least two of: T-T edges that connect social network nodes representing two social network posts; T-U edges between a social network node representing a social network post and a user node representing its author; and U-U edges between nodes representing two users who are in a follows relationship.
7. The method of claim 6 , wherein the edges of the social network graph are weighted differently for each of T-T edges, T-U edges, and U-U edges.