Eri Matsui (松居 エリ , 1952 in Aichi Prefecture[1][2]) is a Japanese fashion designer known for mathematically-inspired designs. Her 2000 collection featured many designs created using the Mathematica software program. In the spring of 2006 she made news by designing a wedding dress intended to look good in zero-g and sponsored a design competition for clothing to be worn under such conditions, the Hyper Space Couture Design Contest.