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math.CO2022
Moore-Penrose inverse of distance Laplacians of trees are Z matrices
R. Balaji, Vinayak Gupta
We show that all off-diagonal entries in the Moore-Penrose inverse of the distance Laplacian matrix of a tree are non-positive.
math.CO2022
Inverse formula for distance matrices of gear graphs
R. Balaji, Vinayak Gupta
Distance matrices of some star like graphs are investigated in \cite{JAK}. These graphs are trees which are stars, wheel graphs, helm graphs and gear graphs. Except for gear graphs…