Music: Brad Mehldau and Bad Plus piano trios bring heft to UCLA

For fans of the piano trio, this bill could be considered something of a meeting of two heavyweights. An ambitious, expressive artist, Brad Mehldau’s threesome was in typically remarkable form on two 2012 albums, and the Bad Plus has been pushing boundaries for years with an irreverent mix of head-turning covers and originals. A wild card will most likely be introduced in saxophonist Joshua Redman, who has collaborated with both ensembles in the past. Center for the Art of Performance at UCLA, Royce Hall, 340 Royce Drive, Los Angeles. Sat. $20-$55. cap.ucla.edu.