Catherine Christer Hennix (also known as C.C. Hennix, born 1948) is a Swedish musician, poet, philosopher, mathematician and visual artist. As a musician, she has worked with figures such as Pandit Pran Nath, La Monte Young, and Henry Flynt, and is associated with the early minimalist movement. Several of her archival recordings from earlier decades have been released in the 21st century, most prominently The Electric Harpsichord (2010). Hennix was affiliated with MIT's AI Lab in the late 1970s and was later employed as research professor of mathematics at SUNY New Paltz; she also worked with mathematician Alexander Esenin-Volpin.