In this paper, by using the omega-index theory introduced by Y. Long in (19
99, Pacific J. 1Math. 187, 113-149), in particular, the splitting numbers,
Maslov-type mean index, and the homotopy component of symplectic matrix, we
establish various inequalities of the Maslov-type index theory for iterati
ons of symplectic paths starting from the identity. As an application, thes
e results are used to study Rabinowitz' conjecture on the prescribed minima
l period solution problem of nonlinear Hamiltonian systems. (C) 2000 Academ
ic Press.