an:06383050
Zbl 1310.54002
Beshimov, Ruzinazar B.; Mamadaliev, Nodirbek K.
Some cardinal properties of stratifiable spaces and the space of linked systems with compact elements
EN
Math. Aeterna 4, No. 1, 45-54 (2014).
00330786
2014
j
54A25 54D80 54E20
stratifiable space; linked system; superextension; cardinal function
The authors prove some equalities and inequalities for cardinal functions on stratifiable spaces and on spaces of linked systems.
The first one adds equality of density and \(\pi\)-network weight to a list of coinciding cardinal functions for stratifiable spaces. However the proof of this equality is universally valid.
Other results deal with \(\pi\)-weight, \(\pi\)-character and (pre-)calibers of the space of linked systems with compact elements.
K. P. Hart (Delft)