Where to find info on (polytime) approximability of various discrete optimization problems? Where to find info on (polytime) approximability of  various discrete optimization problems?
Sorry if this is stupid,but is there a site or reference that keeps up to date info on approximability of various optimization problems?
The following website seems to be no longer maintained, but it is still a useful resource because it covers many problems: http://www.csc.kth.se/~viggo/problemlist/