Names vs. The Nothing This is the first site along the tour. In here we have a void. I remember the building that used to stand here, it was painted blue. Passing through it, you can imagine how us, as ghosts – should the building be standing here – would have to actually be invisible to pass through these walls and now it’s the reverse. The building is the ghost and we’re passing through these walls. Graham Coreil-Allen & Roman Mars, 99% Invisible 99percentinvisible.org New Public SitesLocal Code: 3,659 Proposals About Data, Design & The Nature of Cities emptinessnamescities
New Public Sites A Place by Graham Coreil-Allen newpublicsites.org New Public Sites walking tours explore the history, design and uses of public spaces. Through walking tours, maps and videos, Public Artist Graham Coreil-Allen pushes pedestrian agency, interprets aspects of the everyday and investigates the negotiable nature of the built environment. New Public Sites invites you to practice “radical pedestrianism” – traveling by foot through infinite sites of freedom while testing the limits of and redefining public space. Names vs. The Nothing urbanismwalking
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