4 papers
Irreducibility criterion for certain trinomials
Biswajit Koley, A. Satyanarayana Reddy
In this article we study the irreducibility of polynomials of the form , being a prime number. We will show that they are irreducible for . We have als…
Number of non-primes in the set of units modulo
Abhijit A J, A. Satyanarayana Reddy
In this work, we studied various properties of arithmetic function , where $\tildeφ(n)=|\{m\in \mathbb{N} | 1\le m\le n, (m,n)=1, \mbox{$m$ is not a prime}\}|.$
Adjacency Algebra of Unitary Cayley Graph
A. Satyanarayana Reddy
A few properties of unitary Cayley graphs are explored using their eigenvalues. It is shown that the adjacency algebra of a unitary Cayley graph is a coherent algebra. Finally, a c…
Few Non-derogatory Directed Graphs from Directed Cycles
A. Satyanarayana Reddy
We constructed a few non-derogatory digraphs by adding arcs to a directed cycle and computed their characteristic polynomials and exponents.