Bemerkungen über TD-Räume.
Bemerkungen zum Kongressvortrag “Stetigkeitsbegriff und abstrakte Mengenlehre” von F. Riesz
Bemerkungen zur Katastrophentheorie.
Bend sets, -sequences, and mappings.
B-equicontinuity in function spaces
Bericht über einige neue Ergebnisse und Probleme auf dem Gebiet der anschaulichen Topologie.
Bernard Bolzano a teorie dimenze
Bernstein sets with algebraic properties
We construct Bernstein sets in ℝ having some additional algebraic properties. In particular, solving a problem of Kraszewski, Rałowski, Szczepaniak and Żeberski, we construct a Bernstein set which is a < c-covering and improve some other results of Rałowski, Szczepaniak and Żeberski on nonmeasurable sets.
Best approximation and fixed points in strong -starshaped metric spaces.
Best approximation for nonconvex set in -normed space
Some existence results on best approximation are proved without starshaped subset and affine mapping in the set up of -normed space. First, we consider the closed subset and then weakly compact subsets for said purpose. Our results improve the result of Mukherjee and Som (Mukherjee, R. N., Som, T., A note on an application of a fixed point theorem in approximation theory, Indian J. Pure Appl. Math. 16(3) (1985), 243–244.) and Jungck and Sessa (Jungck, G., Sessa, S., Fixed point theorems in best...
Best approximation of coincidence points in metric trees
In this work we present results on fixed points, pairs of coincidence points and best approximation for ε-semicontinuous mappings in metric trees. It is a generalization of the similar properties of upper and almost lower semicontinuous mappings.
Best approximations theorem for a couple in cone Banach space.
Best constants for metric space inversion inequalities
For every metric space (X, d) and origin o ∈ X, we show the inequality I o(x, y) ≤ 2d o(x, y), where I o(x, y) = d(x, y)/d(x, o)d(y, o) is the metric space inversion semimetric, d o is a metric subordinate to I o, and x, y ∈ X o The constant 2 is best possible.
Best proximity pairs for upper semicontinuous set-valued maps in hyperconvex metric spaces.
Best proximity pairs theorems for continuous set-valued maps.
Best proximity point theorems for -cyclic Meir–Keeler contractions.
Best proximity points of cyclic -contractions on reflexive Banach spaces.
Best proximity sets and equilibrium pairs for a finite family of multimaps.
Best simultaneous approximations
In this paper we study simultaneous approximation of real-valued functions in and give a generalization of some related results.
Betti numbers of regions of attraction