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Figure 15
Fundamental tilings for the and subgroups, each shown with a single domain subdivided by triangles. The automorphism swapping the two opposite corners of is generated by a isometry, but this is not the case for . This leads to multiple embeddings of some D symbols in . |


journal menu![[Figure 15]](sh5079fig15.jpg)
and
subgroups, each shown with a single domain subdivided by
triangles. The automorphism swapping the two opposite
corners of 


