International Journal on Minority and Group Rights. Том 10. 2003. С. 203-220
Abstract: The paper presents two incongruent flat simply connected domains with a visually smooth boundary for which the eigenvalues of the Dirichlet–Neumann operator, obtained using the algorithm cited in the paper, are practically identical. DOI 10.1134/S1061920825601107 © Pleiades Publishing, Ltd. 2025.