Reciprocal Complementary Distance Energy of Complement of Line Graphs of Regular Graphs

Authors : Harishchandra RAMANE, B PARVATHALU

Pages : 36-41

Doi:10.36753/mathenot.641660

View : 35 | Download : 5

Publication Date : 2021-03-01

Article Type : Research Paper

Abstract :The reciprocal complementary distance insert ignore into journalissuearticles values($RCD$); matrix of a graph $G$ is defined as $RCDinsert ignore into journalissuearticles values(G); = [r_{ij}]$, where $r_{ij} = \frac{1}{1+D-d_{ij}}$ if $i \neq j$ and $r_{ij} = 0$, otherwise, where $D$ is the diameter of $G$ and $d_{ij}$ is the distance between the vertices $v_i$ and $v_j$ in $G$. The $RCD$-energy of $G$ is defined as the sum of the absolute values of the eigenvalues of $RCD$-matrix. Two graphs are said to be $RCD$-equienergetic if they have same $RCD$-energy. In this paper, the $RCD$-energy of the complement of line graphs of certain regular graphs in terms of the order and degree is obtained and as a consequence, pairs of $RCD$-equienergetic graphs of same order and having different $RCD$-eigenvalues are constructed.
Keywords : Reciprocal complementary distance RCD, eigenvalues, RCD energy of a graph, RCD equienergetic graphs

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