January 28 Lecture (Symmetries).

1. Two simple logos. What are their symmetries?

2. Flag emblems. What are their symmetries?

3. Here is a place to draw objects and move them around using rotations and reflections.

February 4 Lecture (Tilings and Escher).

1. The webMathematica page for this course contains a bunch of homemade scripts about tilings.

(a) Draw your own tiling.

(b) Random coloured tilings

(c) Ammann aperiodic tiling

2.Liberation, Escher 1955

2.Day and night, Escher 1938

2.Encounter, Escher 1944

2.Reptiles, Escher 1943

3.Reptiles: analysis.