  In this paper, we consider the Newton-Schur method in Hilbert space and
obtain quadratic convergence. For the symmetric elliptic eigenvalue problem
discretized by the standard finite element method and non-overlapping domain
decomposition method, we use the Steklov-Poincar\'e operator to reduce the
eigenvalue problem on the domain $\Omega$ into the nonlinear eigenvalue
subproblem on $\Gamma$, which is the union of subdomain boundaries. We prove
that the convergence rate for the Newton-Schur method is $\epsilon_{N}\leq
CH^{2}(1+\ln(H/h))^{2}\epsilon^{2}$, where the constant $C$ is independent of
the fine mesh size $h$ and coarse mesh size $H$, and $\epsilon_{N}$ and
$\epsilon$ are errors after and before one iteration step respectively.
Numerical experiments confirm our theoretical analysis.
