Colour symmetry. Portuguese tiles: Homero Gonçalves - p2 - «p2»

p2

Colour symmetry in the same pattern. Yellow lines are the border of a fundamental region. 2(12) and 2i mean rotations of order 2. (12) means that the colours white and brown are interchanged; i means the identity.

This is an example of the case stated in the  third row of the table in Section 4.1 (Figure 11, «p2») in

Periodical plane puzzles with numbers

Homero Gonçalves | Composições com motivo de padrão | 1966 | MNAz

Imagens copiadas da página 27 de

AZULEJARIA MODERNISTA, MODERNA E CONTEMPORÂNEA (Ana Almeida)

Colour symmetry. Portuguese tiles: Homero Gonçalves - p1 - «p2»

p1

Colour symmetry in the same pattern. Yellow lines are the border of a fundamental region. 2(12) and 2i mean rotations of order 2. (12) means that the colours white and brown are interchanged; i means the identity.

This is an example of the case stated in the  fourth row of the table in Section 4.1 (Figure 11, «p2») in

Periodical plane puzzles with numbers

Homero Gonçalves | Composições com motivo de padrão | 1966 | MNAz

Imagens copiadas da página 27 de

AZULEJARIA MODERNISTA, MODERNA E CONTEMPORÂNEA (Ana Almeida)

Colour symmetry. Pavements: Brasil, S. Paulo - p2 - «p2»

p2

Small yellow circles mean rotations of order 2. Yellow lines are the border of a fundamental region.

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 4.1 (Figure 11, «p2») in

Periodical plane puzzles with numbers

See:
Wallpaper groups. Pavements: Brasil, S. Paulo - p2
Wallpaper groups. Pavements: p2