On the double covers of a line graph

Shivani Chauhan, A. Satyanarayana Reddy

Let $L(X)$ be the line graph of graph $X$. Let $X^{\prime \prime }$ be the Kronecker product of $X$ by $K_2$. In this paper, we see that $L(X^{\prime \prime })$ is a double cover of $L…