DNF Counting
l Given DNF formula (OR of ANDs)
(e1 Ùe2 Ù e3) Ú (e1 Ù e4) Ú (e2 Ù e6)
l Each variable set true with probability p
l Estimate Pr[formula true]
» #P-complete
l [KL, KLM] FPRAS
» Skew to make true outcomes “common”
» Time linear in formula size