Results 41 to 50 of about 830,992 (228)

Obstructions to nonpositive curvature for open manifolds

open access: yes, 2014
We study algebraic conditions on a group G under which every properly discontinuous, isometric G-action on a Hadamard manifold has a G-invariant Busemann function.
Alperin   +63 more
core   +1 more source

Completeness of the set of sub-σ-algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1993
A new metric is introduced on the set of all sub-σ-algebras of a complete probability space from functional analysis point of view. In this note, we will show that the resulting metric space is complete.
Xikui Wang
doaj   +1 more source

New dynamic fixed point results in Menger spaces [PDF]

open access: yesSurveys in Mathematics and its Applications, 2023
The objective of this paper is to generalize and improve some results in fixed point theorems in both complete metric space and Menger space. These results are generalizations of the analogous ones recently proved by Khojasteh [5], Demma [1], Yildirim ...
Besma Laouadi   +4 more
doaj  

Bounded time computation on metric spaces and Banach spaces

open access: yes, 2017
We extend the framework by Kawamura and Cook for investigating computational complexity for operators occurring in analysis. This model is based on second-order complexity theory for functions on the Baire space, which is lifted to metric spaces by means
Schröder, Matthias, Steinberg, Florian
core   +1 more source

Some New Results on F-Contractions in 0-Complete Partial Metric Spaces and 0-Complete Metric-Like Spaces

open access: yesFractal and Fractional, 2021
Within this manuscript we generalize the two recently obtained results of O. Popescu and G. Stan, regarding the F-contractions in complete, ordinary metric space to 0-complete partial metric space and 0-complete metric-like space.
Stojan Radenović   +2 more
doaj   +1 more source

Some Extensions of Fixed Point Results over Quasi-JS-Spaces

open access: yesJournal of Function Spaces, 2016
We introduce the notion of quasi-JS-metric space. After defining the basic topological properties of quasi-JS-metric space, we investigate fixed point of certain mapping in the frame of complete quasi-JS-metric space.
Maha Noorwali   +2 more
doaj   +1 more source

On completable fuzzy metric spaces [PDF]

open access: yesFuzzy Sets and Systems, 2015
In this paper we construct a non-completable fuzzy metric space in the sense of George and Veeramani which allows to answer an open question related to continuity on the real parameter t. In addition, the constructed space is not strong (non-Archimedean).
Valentín Gregori   +2 more
openaire   +4 more sources

The Metric of Yang-Mills Orbit Space on the Lattice

open access: yes, 2014
We find coordinates, the metric tensor, the inverse metric tensor and the Laplace-Beltrami operator for the orbit space of Hamiltonian SU(2) gauge theory on a finite, rectangular lattice. This is done using a complete axial gauge fixing.
A. Lichnérowicz   +4 more
core   +1 more source

COINCIDENCE THEOREMS IN COMPLETE METRIC SPACES

open access: yesTamkang Journal of Mathematics, 1999
The purpose of this paper is to introduce new classes of generalized contractive type set-valued mappings and weakly dissipative mappings and to prove some coincidence theorems for these mappings by using the concept of $\omega$-distances.
Cho, Y. J., Huang, N. J., Xiang, L.
openaire   +3 more sources

On the weak-hash metric for boundedly finite integer-valued measures

open access: yes, 2018
It is known that the space of boundedly finite integer-valued measures on a complete separable metric space becomes itself a complete separable metric space when endowed with the weak-hash metric. It is also known that convergence under this topology can
Morariu-Patrichi, Maxime
core   +1 more source

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