Images for Mathematics

A gate 2*22

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In Milan, Corso Europa, a gate as an example of a wallpaper pattern with 2*22 symmetry type. At first sight, it might look like a 4*2 symmetry type. But in fact you cannot find a 90 degrees rotation that fixes the pattern.

The image belongs to the sections...:
2*22 (cmm) (Symmetry)
Gates and other dividing elements (Anthology of images)
Gates and other dividing elements (Symmetry)
In the city center (From the exhibitions of matematita)


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