Theory of self-adjoint extensions of symmetric operators. entire operators and boundary-value problems
This is a brief survey of M. G. Krein's contribution to the theory of self-adjoint extensions of Hermitian operators and to the theory of boundary value problems for differential equations. The further development of these results is also considered.
English version (Springer): Ukrainian Mathematical Journal 46 (1994), no. 1-2, pp 54-61.
Citation Example: Gorbachuk M. L., Gorbachuk V. I. Theory of self-adjoint extensions of symmetric operators. entire operators and boundary-value problems // Ukr. Mat. Zh. - 1994. - 46, № 1-2. - pp. 55–62.