An essay on this discipline opens by describing the author’s dispute with A. E. Housman about whether “exposition… is work for second-rate minds.” A work in this discipline by Aigner and Ziegler is titled for a practitioner’s claim that “you don’t have to believe in (10[1])God, but you should believe in The Book.” In an essay on this discipline, the 62-year-old author (10[1])calls it a “young man’s game” (10[1])and praises its “uselessness.” George Andrews discovered the so-called “lost notebook” of a scholar of this discipline, who died at 32 after being brought (10[1])to Cambridge by the author of an “Apology” for this discipline. Games in this discipline were the subject of a column by Martin Gardner. For 10 points, what academic discipline was studied by G. H. Hardy and Srinivasa Ramanujan? ■END■