It’s always fun to figure out teachers and grandteachers. Many family trees of the sort come round to the same names in several ways. For example, I get to Nadia Boulanger either as a grandteacher via Gil Miranda, or a great-grandteacher via Alvin Lucier and Aaron Copland. I get to Schoenberg in a number of ways, as a grandchild via Lou Harrison (who also studied with Cowell), and a great-grandchild via La Monte Young & Leonard Stein or Gordon Mumma and Roberto Gerhard.

Stravinsky did, in fact, teach your senior UCLA colleague Robert Stevenson. Stevenson taught La Monte Young (via Young, I also get Stockhausen and Messiaen). Stravinsky had at least one wealthy private composition student in LA (with whom, supposedly, a complete symphony was composed) and Robert Craft has confirmed that the late rock musican Warren Zevon studied some with Stravinsky as a youth.