facing tile การใช้

Each vault has more than 1, 600 face tiles.
About half the face tiles had to be replaced with new ones made by Boston Valley Terra Cotta, near Buffalo.
In mathematics, Keller's conjecture on face-to-face tiling of hypercubes was disproved by, who used a clique-finding algorithm on an associated graph to find a counterexample.
This clique leads to a non-face-to-face tiling in dimension 10, and copies of it can be stacked ( offset by half a unit in each coordinate direction ) to produce non-face-to-face tilings in any higher dimension.
They are made of one layer of " face tile " _ that is, the cream-colored tile visible from below _ and four layers of backing tile . ( The layering technique is clearly visible in the edges of the ribs between vaults .)