Before revision:  To achieve this pass bound, our algorithm combines a number of techniques  from different fields such as the interior point method (IPM), symmetric diagonally dominant (SDD ) system solving , the isolation lemma, and LP duality.
After revision:  To achieve this pass bound, our algorithm combines a number of techniques from different fields , most notably the construction of interior point method (IPM), symmetric diagonally dominant (SDD ) system solving , the isolation lemma, and LP duality.