Born on July 10, 1939 in Zurich. Constructivist painter and author of texts on concrete art. After being subjected to the influence of concretists of Zurich he begins his indipendent path with the “series” of pyramidal projections. In 1977 he introduced the topic of non-Euclidean geometry on constructivist art. From 1961 to 1997 he lived in Italy. Now he lives in Parigi. He works with international museums and galleries.