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The minimal degree Kirchhoff index of bicyclic graphs
AIMS Mathematics 2024, 9(7): 19822-19842
Published: 15 July 2024
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The degree Kirchhoff index of graph G is defined as K f ( G ) = u , v V ( G ) d ( u ) d ( v ) r G ( u , v ), where d ( u ) is the degree of vertex u and r G ( u , v ) is the resistance distance between the vertices u and v. In this paper, we characterize bicyclic graphs with exactly two cycles having the minimum degree Kirchhoff index of order n 5. Moreover, we obtain the minimum degree Kirchhoff index on bicyclic graphs of order n 4 with exactly three cycles, and all bicyclic graphs of order n 4 where the minimum degree Kirchhoff index has been obtained.

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