(b Buenos Aires, 13 May 1929; d 1994). Argentine painter, sculptor and draughtsman. He studied architecture at the University of Córdoba in Argentina from 1948 to 1951 but later decided to devote himself to painting, in which he was self-taught. Like other artists working in New York, where he settled in 1958 on being awarded a Guggenheim Fellowship, he reacted against Abstract Expressionism, in his case by developing a highly personal vocabulary and by incorporating sculptural elements within spaces hollowed out from the canvas support. These geometrical or enigmatic objects are presented as agents of revelation, emblems resonant with ancient significance, bringing together geometry, mathematics and astronomy in order to penetrate the secret labyrinths of the unconscious. Supreme Astrolabe (1973; New York, Guggenheim) is a good example of his extraordinarily rich work, as minutely detailed as that of a goldsmith. In other constructions he explored a psychologically intimate sense of space, as in Trapped Angel III (acrylic on canvas and wood, 1980; Buenos Aires, Mus. N. B.A.).