In a recent study, mathematicians from Freie Universität Berlin have demonstrated that planar tiling, or tessellation, is much more than a way to create a pretty pattern. Consisting of a surface ...

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 268, No. 1334 (Jul. 24, 1962), pp. 390-404 (15 pages) A method is developed for solving the mixed ...