Showing math.GNShow all
2 papers · 1 filter
math.GN2026
On fuzzy contractions in fuzzy metric spaces
Fengshuo Xu, Haitao Ji, Dong Qiu
The classical Banach principle relies on contractive sequences being Cauchy. Gregori and Sapena (2002) established a fuzzy analogue but required this as an extra hypothesis, leavin…
math.GN2026
Smyth power space of a co-sober space is not always co-sober
Xiaoquan Xu, Fengshuo Xu, Haitao Ji +1
In this paper, we give a co-sober space whose Smyth power space is not co-sober, which gives a negative answer to an open problem.