ON ANTIADJACENCY MATRIX OF A DIGRAPH WITH DIRECTED DIGON(S)

  • Muhammad Irfan Arsyad Prayitno Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Indonesia,
  • Kiki Ariyanti Sugeng Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Indonesia
Keywords: Antiadjacency matrix, arc, characteristic polynomial, determinant, digraph, directed digon

Abstract

The antiadjacency matrix is one representation matrix of a digraph. In this paper, we find the determinant and the characteristic polynomial of the antiadjacency matrix of a digraph with directed digon(s). The digraph that we will discuss is a digraph obtained by adding arc(s) in an arborescence path digraph such that it contained directed digon(s), and a digraph obtained by deleting arc(s) in a complete star digraph. We found that the determinant and the coefficient of the characteristic polynomial of the antiadjacency matrix of a digraph obtained by adding arc(s) in an arborescence path digraph such that it contained directed digon(s) is different depending on the location of the directed digon. Meanwhile, the determinant of the antiadjacency matrix of a digraph obtained by deleting arc(s) in the complete star digraph is zero.

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Author Biography

Kiki Ariyanti Sugeng, Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Indonesia

Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Indonesia

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Published
2022-06-01
How to Cite
[1]
M. Prayitno and K. Sugeng, “ON ANTIADJACENCY MATRIX OF A DIGRAPH WITH DIRECTED DIGON(S)”, BAREKENG: J. Math. & App., vol. 16, no. 2, pp. 497-506, Jun. 2022.