Five integral inequalities; an inheritance from Hardy and Littlewood.
Floquet operators with singular spectrum. III
Formally normal ordinary differential operators
Friedrichs extension of operators defined by linear Hamiltonian systems on unbounded interval
In this paper we consider a linear operator on an unbounded interval associated with a matrix linear Hamiltonian system. We characterize its Friedrichs extension in terms of the recessive system of solutions at infinity. This generalizes a similar result obtained by Marletta and Zettl for linear operators defined by even order Sturm-Liouville differential equations.
Fučík spectra for vector equations.