Published online by Cambridge University Press: 24 October 2008
Let U(1, n; ℂ) be the automorphism group of the Hermitian form
for . We can regard an element of U(1, n; ℂ) as a transformation acting on , where is the closure of the complex unit ball
The non-trivial elements of U(1, n; ℂ) fall into three conjugacy types, depending on the number and the location of their fixed points. Let g be a non-trivial element of U(1, n; ℂ). We call g elliptic if it has a fixed point in Bn and g parabolic if it has exactly one fixed point and this lies on the boundary ∂Bn. An element g will be called loxodromic if it has exactly two fixed points and they lie on ∂Bn.