x²+y²+z²≤r²

x²+y²+z²≤r²

2026
Acrylic, charcoal pencil and pastel pencil on cotton canvas with gummed kraft tape
46 x 46 x 2 cm
RT4A-2606-0201
Courtesy of the artist

x² + y² + z² ≤ r² describes a solid ball: all points at a distance of at most r from its centre. The painting gives the formula a body—a sphere and its cast shadow on acid yellow—on the series’ square canvas.