And finally, at the ICA Friday, the opening from 6 to 8 p.m. for a retrospective of work by appropriation artist Richard Pettibone; “Springtide,” including artists Louise Bourgeois, Troy Brauntuch, Berlinde De Bruyckere, Patty Chang and Erick Swenson; plus a student-curated show, Framing Exposure: Process and Politics.”