miscellaneous

Category 20 - Miscellaneous

This category deals with unusual small groups of uniform polychora like antiprisms or snubs. Following are the sub-categories of category 20, click on links for info on the polychora of these groups:

Antiprisms - this group contains 6 antiprismatic polychora, it includes the well known grand antiprism, its conjugate, a double antiprism, and the Johnson Antiprisms.

Snubs - this group contains the 6 known "normal" snubs (snubs outside of those in cat. 27-29), which contains 5 with ionic icoic symmetry and a very special one - rapsady.

Swirlprisms - this group contains a bizarre group of swirly polychora, which have some of the strangest 4-D symmetries known, there are 4 "normal" swirlprisms and 6 hybrid swirlprisms.

Duoprismattic Anomolies - these are the two I have found recently, iquipadah and gaquipadah - these two have 4x4 duoprismattic symmetry - click here for news of this discovery.

So far this category contains 24 polychora and it is still open, there may be many more lurking out there, possibly even unknown sub-categories.

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