Abstract
The ground state of a singularly perturbed nonselfadjoint elliptic operator $$$$ defined on a smooth compact Riemannian manifold with metric aij(x)=(aij(x))−1, is studied. We investigate the limiting behaviour of the first eigenvalue of this operator as μ goes to zero, and find the logarithmic asymptotics of the first eigenfunction everywhere on the manifold. The results are formulated in terms of auxiliary variational problems on the manifold. This approach also allows to study the general singularly perturbed second order elliptic operator on a bounded domain in Rn.
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