On a certain property of a regular difference operator with variable coefficients. It will be proved that this
operator maps continuously and bijectively the Sobolev space of
order k
Regularization of the Cauchy Problem for Elliptic OperatorsWe regularize the ill-posed Cauchy problem for a first
order elliptic matrix differential
operator Sharp spectral stability estimates via the Lebesgue measure of domains for higher order elliptic operators-adjoint elliptic
operators of arbitrary even
order upon variation of the open sets on which they are defined
Операторное уравнение со второй производной по времени и уравнения ГамильтонаThe given
operator equation with the
second time derivative, admitting a direct variational
Second order conditions in optimal control problems with equality constraints. We introduce a new natural definition of singular control for which we obtain
second-order necessary
On the Second Order Sufficient Optimality Conditions for a Problem of Mathematical Programming sufficient
second-order optimality conditions, the set of Lagrange multipliers can be replaced by a smaller
The Lp-dissipativity of certain differential and integral operators concerning the Lp-dissipativity of scalar and matrix partial differential
operators. In the
second part we