(b Buenos Aires, 1 Oct 1927). Argentine painter, graphic designer, teacher and critic. After studying in Japan from 1935 to 1951 he returned to Argentina, remaining there until his move to New York in 1963. His paintings from 1952 were in the style of Art informel, with a calligraphic emphasis demonstrating his sympathy with oriental art, but around 1960 he moved towards a more gestural abstraction in works such as Painting No. 20 (1961; Buenos Aires, Mus. A. Mod.), using thicker paint and more subdued colours.