Each drawing by Lun-Yi Tsai (a Seattle-based artist who has been a research fellow at MIT) is based on a mathematical theory. Dan Pollack's Wormhole Construction refers to Pollack's discovery of how to construct wormholes between any two points of an Einsteinian space while maintaining its structure (well, you have to maintain the structure). In a talk this afternoon, Dan Pollack will elaborate on his mathematical theories of space. Painter Margie Livingston will discuss her artistic theories of space. Other math-art events will rock the gallery on Saturdays until June 2. (Shift Studio, 306 S Washington St, www.shiftstudio.org. 3 pm, free.)