Abstract
The article concerns the study of conditions on the non-self-adjoint elliptic operator defined in the whole space ℝn, ensuring the existence and uniqueness of a constant-sign eigenfunction tending to zero at infinity. We also study the asymptotics of the corresponding eigenvalue as the coefficient in the highest-order derivative of the operator tends to zero. The result is formulated in terms connected with the variational problem for the Lagrangian on one-dimensional trajectories in the space ℝn. The explicit form of this Lagrangian is given in terms of the coefficients of the original operator.
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Pyatnitskii, A.L., Shamaev, A.S. On the Asymptotic Behavior of Eigenvalues and Eigenfunctions of Non-Self-Adjoint Elliptic Operators. Journal of Mathematical Sciences 120, 1411–1423 (2004). https://doi.org/10.1023/B:JOTH.0000016058.00000.92
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DOI: https://doi.org/10.1023/B:JOTH.0000016058.00000.92