Tag Archives: polyhedral groups

Groups with unique involution

I discussed the binary polyhedral groups in the second post on the ADE diagrams. A more general class of groups has cropped up a couple of times recently, namely finite groups containing a unique involution. I’d like to discuss them … Continue reading

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The ADE affair, 2

In this post, I will discuss a remarkable connection between the ADE diagrams and the regular polyhedra in 3-space (or, more precisely, the finite groups of rotations). Regular polyhedra The five regular polyhedra have been central to mathematics since the … Continue reading

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