A common way for lower bounding the expansion of a graph is by
looking the second smallest eigenvalue of its Laplacian matrix.
Also known as the easy direction of Cheeger's inequality, this
bound becomes too weak when the expansion is o(1). In 2004...
Let \chi be a primitive real character. We first establish a
relationship between the existence of the Landau-Siegel zero of
L(s,\chi) and the distribution of zeros of the Dirichlet L-function
L(s,\psi), with \psi belonging to a set \Psi of...
