Engel points out that origami has been taken up in this country by mathematicians rather than artists. He says: "To the mathematician, the beauty oforigami is its simple geometry. Latent in every pristine piece of paper are undis-closed geometric patterns, combinations of angles, and ratios that per-mit the paper to assume interesting and symmetrical shapes."An origami figure always begins with a single square piece of paper. Only folding, with no cutting or pasting, is permitted.in: Jay Kappraff (1990) Connections. The geometric bridge between art and science.