# Search results for: E. Tsekanovskii

Complex Analysis and Operator Theory > 2019 > 13 > 3 > 1227-1311

*Q*and their representations as impedance of conservative L-systems. Perturbation classes $${{\mathfrak {M}}}^Q$$ M Q , $${{\mathfrak {M}}}^Q_\kappa $$ M κ Q , $${{\mathfrak {M}}}^{-1,Q}_\kappa $$ M κ - 1 , Q are introduced and for each class the realization theorem...

Operator Theory: Advances and Applications > Current Trends in Operator Theory and its Applications > 47-77

Operator Theory: Advances and Applications > Modern Analysis and Applications > Plenary Talks > 65-112

Theoretical and Mathematical Physics > 2016 > 186 > 1 > 41-60

_{g}AU*

_{g}= g(A) on Dom(A), where A is a densely defined operator and G ∋ g ↦ U

_{g}is a unitary representation of the subgroup G of the affine group

*G*, the group of affine orientation-preserving transformations of the real axis. If A is a symmetric operator, then the group G induces an action/flow on the operator unit ball of contracting transformations...

Complex Analysis and Operator Theory > 2016 > 10 > 4 > 835-880

Journal of Mathematical Analysis and Applications > 2004 > 294 > 2 > 666-686