Integral Cayley graphs, a notable subject within spectral graph theory, are graphs constructed from finite groups with the defining property that all eigenvalues of their associated adjacency matrices ...

The energy of a graph is the sum of the moduli of the eigenvalues of its adjacency matrix. We study the energy of integral circulant graphs, also called gcd graphs. Such a graph can be characterized ...

It is not known whether or not the stable rational cohomology groups H̃* (Aut(F∞); ℚ) always vanish (see Hatcher in [5] and Hatcher and Vogtmann in [7] where they pose the question and show that it ...