Clifford Singer, 2021©, Neuberg Straphoid Apollonian Origin, (Closed Universe), Archival Ink on Paper, 24 x 18 inches

CLIFFORD SINGER, 1978©, HYPER CUBE SERIES, GOUACHE ON ACRYLIC ON CANVAS, 20 X 24 INCHES, [WHITE LINES HAND PAINTED WITH GOUACHE USING SABLE BRUSH]