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math.CO2022
Extensions on spectral extrema of -free graphs with given size
Shuchao Li, Wanting Sun, Wei Wei
Let denote a set of graphs. A graph is said to be -free if it does not contain any element of as a subgraph. The Turán number is the ma…
math.CO2022
Sharp bounds on the -index of graphs in terms of the independence number
Wanting Sun, Lixia Yan, Shuchao Li +1
Given a graph , the adjacency matrix and degree diagonal matrix of are denoted by and , respectively. In 2017, Nikiforov \cite{0007} proposed the -matrix:…