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(p, q)-Summing Sequences of Operators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: José Luis Arregui Oscar BlascoA sequence (u j)j∈N of operators inL (X, Y) is a (p, q)-summing multiplier (or (p, q)-summing sequence of operators), in short (u j) ∈l πp, q (X, Y), if there exists a constant C > 0 such that, for... -
Multipliers of Hardy Spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Beth OsikiewiczWe summarize the results on multipliers from H p to l q for various p and q. In some instances we provide proofs which are different from the ones in the literature. On other occasions we are able to improve... -
Multipliers on noncommutative Orlicz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Louis E. Labuschagne --- School for Comp., Stat. & Math. Sci., Fac. of Nat. Sci., South AfricaWe establish very general criteria for the existence of multiplication operators between noncommutative Orlicz spaces L ψ0 and Lψ1 . We then show that these criteria contain existing results, before going on to briefly look at the extent to which... -
Analytical approaches for growth models in economics
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Gülden Gün Polat --- Gebze Technical University, Turkey Teoman Özer --- İstanbul Technical University, TurkeyThis study deals with the group-theoretical analysis of nonlinear optimal control problems called the optimal growth model with the environmental asset and capitalist decision model of endogenous growth, which are expressed in terms of the current and present value Hamiltonian... -
Pointwise multipliers between spaces of analytic functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Daniel Girela --- Universidad de Málaga, Spain Noel Merchán --- Universidad de Málaga, SpainA Banach space X of analytic function in , the unit disc in , is said to be admissible if it contains the polynomials and convergence in X implies uniform convergence in compact subsets of .