Sudoku graphs are integral (Q2380215)
From MaRDI portal
scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Sudoku graphs are integral |
scientific article |
Statements
Sudoku graphs are integral (English)
0 references
26 March 2010
0 references
Summary: Sudoku graphs have only 5 or 6 distinct eigenvalues and all of them are integers. Moreover, the associated eigenspaces admit bases with entries from the set \(\{0, 1, - 1\}\).
0 references
sudoku graphs
0 references
eigenvalue
0 references
eigenspaces
0 references
integral graph
0 references
graph spectrum
0 references
