_{(attributed in various forms variously to mathematician Henri Poincaré; cf. No Concepts At All (22 Feb 2001), Logic and Information (1 Aug 2001), Millennium Math (2002-12-05), Gateways to Mathematics (2004-05-20), Circle Squaring (2005-07-25), Math and Sex (2007-09-18), ...) - ^z - 2008-11-09}