Colour symmetry. Portuguese pavements: Brasil, Londrina and Ipanema, Calçadão - p2mm - «c2mm»

Londrina, Calçadão

«desenhos» are all drawn by Jorge Rezende

p2mm
Small yellow circles mean rotations of order 2. Mirrors are represented by red lines.

Mirrors are represented by red lines, glide reflections by green lines. Small yellow circles mean rotations of order 2. Yellow lines are the border of a fundamental region. (12) means that the colours white and grey are interchanged; i means the identity.

This is an example of the case stated in the third row of the table in Section 4.8 (Figure 13, «c2mm») in

Periodical plane puzzles with numbers

The pavement in Ipanema is similar:

Calçadão de Ipanema 2006

See:
Wallpaper groups. Portuguese pavements: Brasil, Londrina, Calçadão - p2mm
Wallpaper groups. Portuguese pavements: p2mm
Wallpaper groups. Portuguese pavements: Ipanema, Calçadão - p2mm
"Num tempo / página infeliz de nossa história..."

Garota de Ipanema

(Vinícius de Moraes / Tom Jobim)