Primary Non-QE Graphs on Six Vertices
Keywords:
distance matrix,
graphs on six vertices,
primary non-QE graph,
QE constant,
quadratic embedding
2023 Volume 29 Issue 2 Pages 141-156
Details
2023 Volume 29 Issue 2 Pages 141-156
A connected graph is called of non-QE class if it does not admit a quadratic embedding in a Euclidean space. A non-QE graph is called primary if it does not contain a non-QE graph as an isometrically embedded proper subgraph. The graphs on six vertices are completely classified into the classes of QE graphs, of non-QE graphs, and of primary non-QE graphs.
