Graph curvature and Laplacian operators form a vibrant area of research at the intersection of differential geometry and graph theory. The concept of graph curvature, inspired by classical Ricci ...

Big advances in math can happen when mathematicians move ideas into areas where they seem like they shouldn’t belong. My latest story is about the mathematician June Huh, who came into the field late ...

Let L = D - A be the Laplacian matrix of a graph G of order n. Let t k be the kth largest eigenvalue of L (k = 1,...,n). For the purpose of this month's problem, we call the number [1] R. Grone, R.