Showing posts with label pavements. Show all posts
Showing posts with label pavements. Show all posts

Saturday, March 17, 2012

Colour symmetry. Portuguese pavements: Lisboa, Praça do Município, Eduardo Nery - p4mm - «p4mm»

Versão da minha exclusiva responsabilidade, feita para este blogue, de uma parte (expandida no desenho) do pavimento da Praça do Município, de Lisboa, cujo autor é Eduardo Nery. Esta versão destina-se apenas a mostrar as propriedades geométricas dessa parte do pavimento.


Numbers mean rotations of order 2 and 4. Mirrors are represented by red lines. Glide reflections are not represented.


Colour symmetry in the same pattern. Small circles mean rotations; numbers mean rotations of order 2 and 4. Mirrors are represented by red lines. Glide reflections are not represented. (12) means that the colours white and grey are interchanged; i means the identity.

This is an example of the case stated in the fourth row of the table in Section 4.10 (Figure 14, «p4mm») in

Eduardo Nery
Image scanned from the book
See:
Eduardo Nery (Official Website)
(in this blog)

Tuesday, March 06, 2012

Colour symmetry. Pavements: Brasil, S. Paulo - 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

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

Thursday, October 20, 2011

Wallpaper groups. Portuguese pavements: Lisboa, Praça do Município, Eduardo Nery - p4mm

Versão da minha exclusiva responsabilidade, feita para este blogue, de uma parte (expandida no desenho) do pavimento da Praça do Município, de Lisboa, cujo autor é Eduardo Nery. Esta versão destina-se apenas a mostrar as propriedades geométricas dessa parte do pavimento.
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Wednesday, June 01, 2011