Here is the new 30 second commercial for Kansas City, Missouris's KXTR [1660am] which is also coincidental in that on November 20th Entercom.com began "high definition" broadcasting for KXTR. The question is...what are the equations on the blackboard. I don't recognize anything significant and they may well represent a director's appeal to higher mathematics and the associated mystic clout much like the laboratories in the old horror movies where lab equipment is more for presentation than factual accuracy. I talked to the writer of the commercial and PD for KXTR, Patrick Neas, and he did not know. Any clue?