On the Spectrum of an Equivariant Extension of the Laplace Operator in a Ball
We study the relationship between the well-posedness of an equivariant problem for the Poisson equation in a ball and the spectrum of the operator generated by it.
English version (Springer): Ukrainian Mathematical Journal 52 (2000), no. 11, pp 1679-1690.
Citation Example: Burskii V. P., Shtepina Т. V. On the Spectrum of an Equivariant Extension of the Laplace Operator in a Ball // Ukr. Mat. Zh. - 2000. - 52, № 11. - pp. 1473-1483.