A first countable supercompact Hausdorff space with a closed nonsupercompact subspace
A fixed point approach to the stability of a functional equation of the spiral of Theodorus.
A fixed point approach to the stability of Pexider quadratic functional equation with involution.
A fixed point approach to the stability of quadratic functional equation with involution.
A fixed point conjecture for Borsuk continuous set-valued mappings
The main result of this paper is that for n = 3,4,5 and k = n-2, every Borsuk continuous set-valued map of the closed ball in the n-dimensional Euclidean space with values which are one-point sets or sets homeomorphic to the k-sphere has a fixed point. Our approach fails for (k,n) = (1,4). A relevant counterexample (for the homological method, not for the fixed point conjecture) is indicated.
A fixed point index for bimaps
A Fixed Point Index Theory for Symmetric Product Mappings.
A fixed point principle for locally expansive multifunctions
A fixed point result of Seghal-Smithson type
A fixed point theorem based on Miranda.
A Fixed Point Theorem for a Class of Mappings.
A fixed point theorem for a multivalued non-self mapping
We prove a fixed point theorem for a multivalued non-self mapping in a metrically convex complete metric space. This result generalizes Theorem 1 of Itoh [2].
A fixed point theorem for a nonlinear type contraction.
A fixed point theorem for a pair of maps satisfying a general contractive condition of integral type.
A fixed point theorem for analytic functions.
A fixed point theorem for asymptotically regular mappings
A fixed point theorem for branched covering maps of the plane
It is known that every homeomorphism of the plane which admits an invariant non-separating continuum has a fixed point in the continuum. In this paper we show that any branched covering map of the plane of degree d, |d| ≤ 2, which has an invariant, non-separating continuum Y, either has a fixed point in Y, or is such that Y contains a minimal (in the sense of inclusion among invariant continua), fully invariant, non-separating subcontinuum X. In the latter case, f has to be of degree -2 and X has...
A fixed point theorem for continua which are hereditarily divisible by points
A fixed point theorem for contraction mappings.
A fixed point theorem for expansion mappings in metric spaces over topological semifields