The theater company Complicite’s latest work, “A Disappearing Number,” will be presented at the Power Center for the Performing Arts. The University Musical Society production explores our compulsion to understand. It recently was awarded the 2008 Laurence Olivier Award for Best New Play in London. Performances are at 8 p.m. Sept. 11 and 12, 2 p.m. and 8 p.m. Sept. 13 and 2 p.m. Sept. 14. (Photo by Joris-Jan Bos Photography)