Circle pictures

Hilary Irons, Yarn Tondo, 2007, Oil, acrylic, yarn and glue on canvas, 12 inches diameter

A careful chalkboard drawing of a different sort of spherical unitary dual can be found at What is a representation?.

Last week's Economist tells of a recent breakthrough in the science of surface and symmetry, the mapping of the mathematical object known as E₈, a mathematical object that is symmetrical on 248 axes. It is crudely pictured below in two dimensions.