'Periodic tiling' presentation slideshows

Tessellations

Tessellations. Tessellation. A tessellation or a tiling is a way to cover a floor with shapes so that there is no overlapping or gaps. Remember the last jigsaw puzzle piece you put together? Well, that was a tessellation. The shapes were just really weird. Examples.

723 views • 40 slides

Tessellations all around us

Tessellations all around us. Look for tessellations in walls, patios and pavements. Tessellations all around us. Sometimes an unusual shape will tessellate. Common shapes can be arranged in unusual ways. Tessellations all around us. Sometimes 2 or more different shapes will tessellate.

387 views • 21 slides

Finitely presented nil-semigroups and aperiodic tilings SubTile 2013, CIRM, France

Finitely presented nil-semigroups and aperiodic tilings SubTile 2013, CIRM, France. Alexey Kanel-Belov, Ilya Ivanov-Pogodaev. Semigroups. Simple definitions. Semigroup : set with an associative binary operation. Examples. set of finite words in a finite alphabet,

307 views • 12 slides

An exercise in proving undecidability

186 views • 10 slides