Spectral asymptotics of nonselfadjoint degenerate elliptic operators with singular matrix coefficients on an interval

Some spectral asymptotic properties of the nonselfadjoint operator $A$ associated with a noncoercive bilinear form in the space $\mathcal H^l=L_2(0,1)^l$ are investigated in the article.
Such problems as summability of the Fourier series of elements $f\in\mathcal H^l$ with respect to the system of root vector-functions of the operator $A$ by the Abel method with brackets, estimate for the resolvent of the operator $A$ are considered.