Modular constructivism is a style of sculpture that emerged in the 1950s and 1960s, associated especially with the Yale-trained sculptors Erwin Hauer and Norman Carlberg. Its works are built from carefully structured modules whose combinatorial possibilities are studied intensively, allowing intricate - sometimes infinite - patterns of repetition. The results range from planar, screen-like formations to fully multidimensional structures with a seamless, quasi-organic unity. Hauer's studies of biomorphic 'saddle surfaces', which fuse convex and concave curvature so units can combine smoothly in every direction, were central; Henry Moore's fluid, porous sculpture was another inspiration. Both artists were students of Josef Albers, and the approach carried an implicit formalism and minimalism that held aloof from Pop Art and postmodernism. Hauer's studio adapted the style to light-diffusing architectural screens and walls.