Random fixed points and approximations in random convex metric spaces.
Random fixed points for *-nonexpansive random operators.
Random periodic point and fixed point results for random monotone mappings in ordered Polish spaces.
Random theorems in topology
Random three-step iteration scheme and common random fixed point of three operators.
Range closure extension of input-output relations of topological general systems
Ranks for baire multifunctions
Various ordinal ranks for Baire-1 real-valued functions, which have been used in the literature, are adapted to provide ranks for Baire-1 multifunctions. A new rank is also introduced which, roughly speaking, gives an estimate of how far a Baire-1 multifunction is from being upper semicontinuous.
Rapid ultrafilter need not be Q-point
Rapport entre l'ensemble des ultrafiltres admettant un ultrafiltre donné pour image et l'ensemble des images de cet ultrafiltre
Rare -continuity.
Raster convergence with respect to a closure operator
Rational acyclic resolutions.
Rational extensions of C(X) and semicontinuous functions [Book]
Rational spaces and the property of universality
Rationals as a non-trivial complete convergence group
Rationals with exotic convergences
Rationals with exotic convergences. II.
rc-continuous functions and functions with rc-strongly closed graph.
Reading along arithmetic progressions
Given a 0-1 sequence x in which both letters occur with density 1/2, do there exist arbitrarily long arithmetic progressions along which x reads 010101...? We answer the above negatively by showing that a certain regular triadic Toeplitz sequence does not have this property. On the other hand, we prove that if x is a generalized binary Morse sequence then each block can be read in x along some arithmetic progression.
Real analytic convex surfaces with positive topological entropy and rigid body dynamics.