Area preserving twist homeomorphism of the annulus.
A-realcompact spaces.
Relations between homomorphisms on a real function algebra and different properties (such as being inverse-closed and closed under bounded inversion) are studied.
Arithmetic Properties of certain partially ordered Semigeroups.
Arithmetica topologica
Arithmetisch-topologische Untersuchungen an Ringen mit eingeschränkten Minimalbedingungen
Aronszajn orderings.
Around a quotient space of Bennett-Lutzer's space.
Around Katětov's metrization theorem
Arrows in the “finite product theorem for certain epireflections'” of R. Frič and D. C. Kent
Ascoli's theorem in almost quiet quasi-uniform space.
A-spaces and countably bi-quotient maps [Book]
Aspects of categorical algebra in initialstructure categories
Aspects of complete uniform spreads in frames.
Assad-Kirk-type fixed point theorems for a pair of nonself mappings on cone metric spaces.
Assertion Q distinguishes topologically ω* and when regular and
Association and fixed points
Asymmetric tie-points and almost clopen subsets of
A tie-point of compact space is analogous to a cut-point: the complement of the point falls apart into two relatively clopen non-compact subsets. We review some of the many consistency results that have depended on the construction of tie-points of . One especially important application, due to Veličković, was to the existence of nontrivial involutions on . A tie-point of has been called symmetric if it is the unique fixed point of an involution. We define the notion of an almost clopen set...
Asymptotic dimension of coarse spaces.
Asymptotic estimates for best and stepwise approximation of convex bodies II.
Asymptotic Fixed Point Theorems.