Abstract
We discuss a necessary condition for inclusion relations of weak type discrete Morrey spaces which can be seen as an extension
of the results in [H. Gunawan, E. Kikianty and C. Schwanke,
Discrete Morrey spaces and their inclusion properties,
Math. Nachr. 291 2018, 8–9, 1283–1296]
and
[D. D. Haroske and L. Skrzypczak,
Morrey sequence spaces: Pitt’s theorem and compact embeddings,
Constr. Approx. 51 2020, 3, 505–535].
We also prove a proper inclusion from weak type discrete Morrey spaces into discrete Morrey spaces.
In addition, we give a necessary condition for this inclusion.
Some connections between the inclusion properties of discrete Morrey spaces and those of Morrey spaces are also discussed.