On fixed edges of antitone self-mappings of complete lattices.
On fixed figure problems in fuzzy metric spaces
Fixed circle problems belong to a realm of problems in metric fixed point theory. Specifically, it is a problem of finding self mappings which remain invariant at each point of the circle in the space. Recently this problem is well studied in various metric spaces. Our present work is in the domain of the extension of this line of research in the context of fuzzy metric spaces. For our purpose, we first define the notions of a fixed circle and of a fixed Cassini curve then determine suitable conditions...
On fixed point theorems for absolute retracts
On fixed point theorems for multifunctions in dendroids
On fixed point theorems for multivalued contractions.
On fixed point theorems in 2-metric space.
On Fixed Point Theorems In Banach Spaces
On Fixed Point Theorems of Maia Type
On fixed points.
On fixed points of maximalizing mappings in posets.
On fixed points of set-valued directional contractions.
On fixed-point theorems in complete metric spaces
On four intuitionistic fuzzy topological operators.
Four new operators, which are analogous of the topological operators interior and closure, are defined. Some of their basic properties are studied. Their geometrical interpretations are given.
On f.p.p. and f.*p.p. of some not locally connected continua
On fractional iterates of a homeomorphism of the plane
We find all continuous iterative roots of nth order of a Sperner homeomorphism of the plane onto itself.
On free topological algebras
On Frolík’s characterization of class
On FU()-spaces and -sequential spaces
Following Kombarov we say that is -sequential, for , if for every non-closed subset of there is such that and . This suggests the following definition due to Comfort and Savchenko, independently: is a FU()-space if for every and every there is a function such that . It is not hard to see that ( denotes the Rudin–Keisler order) every -sequential space is -sequential every FU()-space is a FU()-space. We generalize the spaces to construct examples of -sequential...
On function spaces of compact subspaces of Σ-products of the real line
On function spaces of Corson-compact spaces
We apply elementary substructures to characterize the space for Corson-compact spaces. As a result, we prove that a compact space is Corson-compact, if can be represented as a continuous image of a closed subspace of , where is compact and denotes the canonical Lindelöf space of cardinality with one non-isolated point. This answers a question of Archangelskij [2].