4 papers
Total perfect codes in Cayley sum graphs of cyclic groups
Masoumeh Koohestani, Doost Ali Mojdeh, Mohsen Ghasemi
We consider Cayley sum graphs over the cyclic group and aim to explore several necessary and sufficient conditions for the existence of total perfect codes in these…
Some results on perfect codes in Cayley sum graphs
Masoumeh Koohestani, Doost Ali Mojdeh, Mohsen Ghasemi +1
We establish a necessary and sufficient condition for a normal subgroup of a finite group to be a subgroup perfect code.
On Characters of a Class of P-polynomial table algebras and applications
Masoumeh Koohestani, Amir Rahnamai Barghi, Amirhossein Amiraslani
In this paper, we study the characters of homogeneous monotonic P-polynomial table algebras with finite dimension d>=5. We then apply them to association schemes. To this end, we d…
The Application of Tridiagonal Matrices in P-polynomial Table Algebras
Masoumeh Koohestani, Amir Rahnamai Barghi, Amirhossein Amiraslani
In this paper, we study the characters of two classes of P-polynomial table algebras using tridiagonal matrices. To this end, we obtain some results about the eigen-structure of sp…