It is hard to believe that twelve years have passed since the death of R. B. Kitaj, the at-times-controversial artist who coined the term “The London School” about his fellow contemporary artists in Britain (including Lucian Freud and Frank Auerbach) and who spent his last years living in Los Angeles. A new exhibition at LA Louver gallery in Venice, CA, “R.B. Kitaj: Collages and Prints, 1964-1975” reminds us of Kitaj’s great talent and his restless, obsessive intelligence expressed in works t…