Im looking for the vertices of the Perkel graph. I've seen somewhere that the vertex set is $Z_3\times Z_{19}$. What does that mean ? Indeed $3 \times 19 = 57$ but the vertices should be 4-dimensional. I'm a bit ignorant in geometry.
2026-03-25 21:48:48.1774475328
Vertices of the 57 cell Perkel graph
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