FINITE+INFINITE An Exhibition in Three Parts: Dan Graham, Opposing Mirrors and Video Monitors on Time Delay, 1974, (installation view) mirror and closed circuit video and time delay, video camera, and monitor. Collection of the Vancouver Art Gallery, Vancouver Art Gallery Acquisition Fund. First installed at Palais des Beaux-Arts, Bruxelles, 1975. Photo: Blaine Campbell

FINITE+INFINITE An Exhibition in Three Parts: Dan Graham, Opposing Mirrors and Video Monitors on Time Delay, 1974, (installation view) mirror and closed circuit video and time delay, video camera, and monitor. Collection of the Vancouver Art Gallery, Vancouver Art Gallery Acquisition Fund. First installed at Palais des Beaux-Arts, Bruxelles, 1975. Photo: Blaine Campbell