# Juegos topológicos

## Archive for the ‘Sistema de raíces’ Category

### Recuerdos matemáticos bordados en cuero

Posted on: junio 25, 2014

## Bordado del sistema de raíces de un grupo de Ree

(En deferencia a Jesper escribo este primer párrafo en inglés)

I would like to share with all of you, an artwork version of the root system of the Ree group $^2F_4(2^{a+1/2})$, with cotton thread sewn on leather. This was based on the following picture due to Jesper Michael Møller. I presented this art work in a talk entitled “Symmetric patterns in string art“, at the Universitat Autònoma de Barcelona, on March 14th, 2014. Hope you like it. I thank Carles Broto for his kind hospitality and support.

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