The Love Song of J. Alfred Prufrock A Poem by T.S. Eliot www.poetryfoundation.org A pair of ragged clawsDo I dare disturb the universe?That is not it at allI have heard the mermaids singing lonelinessmelancholy
The Waste Land A Poem by T.S. Eliot www.poetryfoundation.org HURRY UP PLEASE ITS TIMEA handful of dustWho walks beside you?Has it begun to sprout?Fragments solitudesociety
Human kind cannot bear very much reality A Fragment by T.S. Eliot www.coldbacon.com Go, go, go, said the bird: human kind Cannot bear very much reality. Time past and time future What might have been and what has been Point to one end, which is always present. realitytime
Wang tiles Wang tiles (Hao Wang, 1961) are a class of formal systems. They are modelled visually by square tiles with a color on each side. A set of such tiles is selected, and copies of the tiles are arranged side by side with matching colors, without rotating or reflecting them. The basic question about a set of Wang tiles is whether it can tile the plane or not, i.e., whether an entire infinite plane can be filled this way. The next question is whether this can be done in a periodic pattern. In 1966, Wang's student Robert Berger solved the problem in the negative. He proved that no algorithm for the problem can exist, by showing how to translate any Turing machine into a set of Wang tiles that tiles the plane if and only if the Turing machine does not halt. The undecidability of the halting problem then implies the undecidability of Wang's tiling problem. Wikipedia en.wikipedia.org Truchet TilesThe Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy mathalgorithms