On the unitary similarity of matrix familiesThe classical Specht criterion for the
unitary similarity between two complex n × n matrices
On the unitary similarity of matrix familiesThe classical Specht criterion for the
unitary similarity between two complex n × n matrices
Application of Banach limits to invariant measures of infinite-dimensional Hamiltonian flows. The introduced
invariant measures help us to describe both the strong continuity subspaces of the Koopman
unitary Invariant Subspaces of Operators on a Hilbert Space to the
invariant subspace problem for an operator on a Hilbert space, based on projection-convex combinations in C
Dual automorphism-invariant modules over perfect rings© 2017, Pleiades Publishing, Ltd. Under study are the dual automorphism-
invariant modules
Action principle and weak invariants© 2019 The Authors A weak
invariant associated with a master equation is characterized in such a
Axially-symmetric topological configurations in the skyrme and faddeev chiral models, in the Skyrme model (SM) the field is given by the
unitary matrix U ∈ SU(2), and in the Faddeev model (FM