A-summation process and Korovkin-type approximation theorem for double sequences of positive linear operators

Artikel in diesem Heft

1. Banaschewski’s theorem for GMV-algebras
2. Some properties of retract lattices of monounary algebras
3. On finite retract lattices of monounary algebras
4. Generalized fuzzy n-ary subhypergroups of a commutative n-ary hypergroup
5. Non-constant periodic solutions for second order Hamiltonian system with a p-Laplacian
6. Oscillation of first-order differential equations with retarded arguments
7. Statistical order convergence in Riesz spaces
8. Some Tauberian conditions for Cesàro summability method
9. A-summation process and Korovkin-type approximation theorem for double sequences of positive linear operators
10. Multiplication operators on Lorentz-Karamata-Bochner spaces
11. Some common fixed point theorems for hybrid pairs of maps without the completeness assumption
12. On lightlike geometry in indefinite Kenmotsu manifolds
13. Subcontinuity