Noun. 1. set theory-the branch of pure mathematics that deals with the nature and relations of sets. math, mathematics, maths-a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement.
Long drive is a competitive sport where success is derived by hitting a golf ball the farthest by driving. A small but dedicated talent base of golfers populate the world of Long-Drive, with the top talent competing professionally in various events and exhibitions.ong drive clubs, which are always drivers, are different in many ways from consumer clubs. Until the recent club length limitation rules, the shafts were much longer than a normal 45 in (114.3 cm) shaft, sometimes exceeding 55 in (139.7 cm).
Gerry Lester Bubba Watson Jr. is an American professional golfer who plays on the PGA Tour. One of the few left-handed golfers on tour, he is a multiple major champion, having won the Masters Tournament in 2012 and 2014. In February 2015, Watson reached a career-high 2nd place in the Official World Golf Ranking. Watson is among the longest drivers on the PGA Tour; in 2007 he had an average drive of 315.2 yards and can hit a ball over 350 yards, capable of generating a ball speed up to 194 mph.