The skeleton of the tesseract, commonly denoted , is a quartic
symmetric graph with girth 4 and diameter 4. The automorphism
group of the tesseract is of order
(Buekenhout and Parker 1998). The figures above
show several nice embeddings of the tesseract graph, the leftmost of which appears
in Coxeter (1973) and a number of which can be found in Carr and Kocay (1999).
It is implemented in the Wolfram Language as GraphData["TesseractGraph"].
The tesseract graph is isomorphic to the 4-Hadamard graph.
It has cycle polynomial
The tesseract graph has two distinct generalized LCF notations of order 4, five of order 2, and four of order 1, illustrated above.
The order-4 LCF notations are given by and
.
It has graph spectrum , making it an integral
graph and cospectral with the Hoffman
graph and meaning that neither of these two graphs is determined
by spectrum.