Colour symmetry. Alexandre Mancini, Brasil - p2mg - «p2mm»

Aeroporto. Author: Alexandre Mancini

Numbers mean rotations of order 2. Mirrors are represented by red lines and and glides by green ones. 

p2mg

Colour symmetry in the same pattern. Reflections are represented by red lines. (12), means that the colours blue and white interchange; i means the identity.

This is an example of the case stated in the fourth row of the table in Section 4.4 (Figure 12, «p2mm») in

Periodical plane puzzles with numbers

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See the same case in

Colour symmetry. Tiles: Athos Bulcão, Brasília Palace Hotel - p2mg - «p2mm»

Colour symmetry. Tiles: Athos Bulcão, Brasília Palace Hotel - p2mg - «p2mm»

Painel de azulejos, Brasília Palace Hotel, 1958.. Foto: Edgar César Filho

Colour symmetry. 2(12) and 2i mean rotations of order 2. (12) means that the colours white and blue are interchanged; i means the identity. Mirrors are represented by red lines.

This is an example of the case stated in the  fourth row of the table in Section 4.4 (Figure 12, «p2mm») in

Periodical plane puzzles with numbers

See:
Wallpaper groups. Tiles: Brasil, Brasilia Palace Hotel - p2mg