Hangzhou Lu Xiang Technology Co., Ltd. applied for a patent titled "Interactive Question and Answer Method and System Based on Artificial Intelligence" in May 2025, which was publicly disclosed by the ...

This is a survey paper on the second largest eigenvalue λ₂ of the adjacency matrix of a graph. Among the topics presented are the graphs with small λ₂, bounds for λ₂, algebraic connectivity, graphs ...

There is substantial interest in the current literature – spanning finance, economics, engineering and medical imaging – on the relationship structure between several nodes in a complex system. In ...