I wrote π live from memory over small paintings and drawings -- about the size of a piece of paper. This is an incentive for both the visual content and the numbers to provide generous detail and precision. π is either embedded in the image or gridded over it.
The subjects painted reflect my interest in mathematics, physics, and the history of science. Figures such as Paul Dirac, Henri Poincare, and Leonard Susskind have taken philosophically distinct roles as physicists.