For ten points, identify this  ne art practiced by people such as Philip Glass and Pyotr Chaikovskiy.
A branch of set theory named after this thing was developed by Howard Han- son; in that  eld, sets which can be transformed into one another by inversion or transposition are said to belong to the same set class. David Lewin developed transformational theory, a way to apply groups to the theory of this thing, in his paper  Generalized [This Thing] Intervals and Transformations . A book by Dave Benson describes this thing as  a Mathematical   O ering , and has chapters entitled  Consonance and dissonance  and  Scales and temperaments: the  vefold way . For ten points, identify this  ne art practiced by people such as Philip Glass and Pyotr Chaikovskiy.
A branch of set theory named after this thing was developed by Howard Han- son; in that  eld, sets which can be transformed into one another by inversion or transposition are said to belong to the same set class.
music