the spectral properties of differential operators with matrix coefficients on elliptic systems with boundary conditions

Let(lv)(t)=∑i,j=1n(−1)jdj(s^2α(t)bij(t)μ(t)div(t)),be a non-selfadjoint differential operator on the hilbert space l2(ω) with dirichlet-type boundary conditions. in continuing of papers [10-12], let the conditions made on the operator l be sufficiently more general than [11] and [12] as defined in section 1. in this paper, we estimate the resolvent of the operator l on the one-dimensional space l2(ω) using some analytic methods.