no code implementations • 25 Jan 2021 • Emilia Blåsten, Hiroshi Isozaki, Matti Lassas, Jinpeng Lu
Suppose that the set of vertices of the graph is a union of two disjoint sets: $X=B\cup G$, where $B$ is called the set of the boundary vertices and $G$ is called the set of the interior vertices.
Spectral Theory 05C50, 05C22, 52C25
