A hub D4
A hub with a dihedral group of symmetry of type D4 (if we ignore the central ellipse...).
From the point of view of topology, it is a surface of genus 4, that can be thought as a doughnut with four holes, or as a sphere with four handles attached.
© matematita
The image belongs to the sections...:
*4. (D4) (Symmetry)
Rims (Anthology of images)
Rims (Symmetry)
Objects (Topology)
