In art—as in many things—going it alone has its advantages, but collaboration, whether fraught or harmonious, gets amazing things done. Works on view this session: a dozen Qing dynasty artists (including Gong Xian and Hongren) and an equal number of calligraphers combine in a stellar album of Chinese landscapes; Hiroshige and Hokusai get credit for wonderful ukiyo-e prints, but unsung draftsmen, carvers, and printers do most of the heavy lifting; the collectives Ant Farm and T. R. Uthco go to Dallas to reenact history; Federico Castellón and Peter Paone alternate letters in their 1970 Erotic Alphabet; Yoko Ono and John Lennon partner for Fluxus fun in photographic projects; and more!