International Journal of Mathematics and Mathematical Sciences
Volume 2005 (2005), Issue 9, Pages 1327-1331
Let be a digraph with vertices and let be its
adjacency matrix. A monic polynomial of degree at most is called an annihilating polynomial of if . is said to be annihilatingly unique if it possesses a unique
annihilating polynomial. Difans and diwheels are two classes of
annihilatingly unique digraphs. In this paper, it is shown that
the complete product of difan and diwheel is annihilatingly unique.