A soundtrack album for the film was released by Capitol Records on November 18, 1997, though only two of Elfman's cues appear on the release. "Afternoon Delight" by the Starland Vocal Band was featured in the film, but did not appear on the soundtrack album. A limited edition soundtrack album featuring Elfman's complete score from the film was released by Music Box Records on March 3, 2014. The soundtrack, issued in 1500 copies, includes all of Elfman's cues (including music not featured on the rare Miramax Academy promo) and also contains the songs by Elliott Smith. One of the tracks is Smith's songs with Elfman's arrangements added into the mix. In an early version of the script, Will Hunting was going to be a physics prodigy, but Nobel Laureate in Physics Sheldon Glashow at Harvard told Damon the subject should be math instead of physics. Glashow referred Damon to his brother-in-law, Daniel Kleitman, a mathematics professor at MIT. In the spring of 1997, Damon and Affleck asked Kleitman to "speak math to us" for writing realistic dialogue, so Kleitman invited postdoc Tom Bohman to join him giving them a "quick lecture". When asked for a problem that Will could solve, Kleitman and Bohman suggested the unsolved computer science P versus NP problem, but the movie used other problems. Columbia University's physics and math professor Brian Greene at the Tribeca Sloan retrospective explained that for physics, "Having some deep insight about the universe [⁠ ⁠.⁠ ⁠.⁠ ⁠.⁠ ⁠] typically [⁠ ⁠is ⁠] a group project in the modern era," while "doing some mathematical theorem is a singular undertaking very often." Patrick O'Donnell, professor of physics at University of Toronto, served as mathematical consultant for the film production. The main hallway blackboard is used twice to reveal Will Hunting's talent, first to the audience, second to Professor Lambeau. Matt Damon based it on his artist brother Kyle visiting MIT's Infinite Corridor and writing "an incredibly elaborate, totally fake, version of an equation" on a blackboard which lasted for months. Kyle returned to Matt saying MIT needed these blackboards "because these kids are so smart they just need to, you know, drop everything and solve problems!" The first turning point in the plot occurs when Will sets aside his mop in a hallway and studies a difficult blackboard graph theory problem posed by Professor Lambeau.