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 ...

Each integral circulant graph ICG(n, D) is characterised by its order n and a set D of positive divisors of n in such a way that it has vertex set ℤ/nℤ and edge set {(a, b) : a, b ∊ ℤ/nℤ, gcd(a — b, n ...

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 ...