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Information × Registration Number 0205U002180, 0102U002221 , R & D reports Title Extension theory of linear operators in Hilbert spaces and its applications popup.stage_title Head Yury Arlinskii, Registration Date 04-02-2005 Organization EAST-UKRAINIAN VOLODIMIR DAL NATIONAL UNIVERSITY popup.description2 New approach to solving John von Neumann's problem on parametrization of all non-negative self-adjoint extensions of a non-negative symmetric operator in Hilbert space is proposed; a general regularization method for singular perturbations of an unbounded self-adjoint operator is offered; parametrization of all maximal accretive and maximal sectorial extensions of a sectorial operator is obtained; the results are applied to differential operators and to quantum Hamiltonians. Product Description popup.authors popup.nrat_date 2020-04-02 Close