Potentiality conditions for partial differential equations with deviating argumentsPotentiality conditions for partial differential
equations with
deviating arguments Variational principles for some differential difference operator difference
equations and to construct of the functional, if the given operator is a potential on a given set
Variational Principles for the Differential Difference Operatorof the Second Order difference
equations and to construct of the functional, if the given operator is a potential on a given set
Variational Principles for a Differential Difference Quasilinear Operator difference
equations and to construct the functional, if the given operator is a potential on a given set