We introduce the notion of the L-core of a graph what enables a simple description of some properties of the eigenspace of the eigenvalue — 2 in generalized line graphs and an elegant formulation of ...

In chemistry, the properties of atoms and molecules can be determined by solving the Schrödinger equation. However, because the dimension of the problem grows exponentially with the size of the ...

Let $\Gamma\backslash\mathscr{H}$ be a finite volume symmetric space with H the product of half planes. Let Δi be the Laplacian on the ith half plane, and assume that we have a cusp form φ, so we have ...