A topology generated by eventually different functions
A topology on inequalities.
A topology with order, graph and an enumeration problem.
A transfinite extension of the covering dimension
A tree -base for without cofinal branches
We prove an analogue to Dordal’s result in P.L. Dordal, A model in which the base-matrix tree cannot have cofinal branches, J. Symbolic Logic 52 (1980), 651–664. He obtained a model of ZFC in which there is a tree -base for with no branches yet of height . We establish that this is also possible for using a natural modification of Mathias forcing.
A Tychonoff non-normal space.
A Tychonoff theorem in intuitionistic fuzzy topological spaces.
A type of βN with relative types
A Unified Theory of Perfect and Related Functions
A unified theory of weak separation properties.
A uniform structure for topological spaces
A unique common fixed point theorem for occasionally weakly compatible maps.
A unique factorization theorem for countable products of circles
A uniquely homogeneous space need not be a topological group
A universal metacompact developable -space of weight m
A universal planar completely regular continuum
We construct a universal planar completely regular continuum. This gives a positive answer to a problem posed by J. Krasinkiewicz (1986).
A Universal Proper G-Space.
A universal property of -semigroups
Let be a -semigroup with unbounded generator . We prove that has generically a very irregular behaviour for as .
A universal separable metric locally finite-dimensional space
A variant of a theorem of Sierpiński concerning partitions of continua