Results 91 to 100 of about 6,808,491 (270)

Causal geometries and third-order ordinary differential equations [PDF]

open access: yes, 2009
We discuss contact invariant structures on the space of solutions of a third-order ordinary differential equation. Associated to any third-order differential equation modulo contact transformations, Chern introduced a degenerate conformal Lorentzian ...
Holland, Jonathan, Sparling, George
core  

Some Fixed Point Theorem for Mapping on Complete G-Metric Spaces

open access: yesFixed Point Theory and Applications, 2008
We prove some fixed point results for mapping satisfying sufficient conditions on complete G-metric space, also we showed that if the G-metric space (X,G) is symmetric, then the existence and uniqueness of these fixed point results follow from well ...
Fadi Awawdeh   +2 more
doaj   +1 more source

A new extension to the controlled metric type spaces endowed with a graph

open access: yesAdvances in Difference Equations, 2021
In this paper, we initiate a new extension of b-metric spaces, called controlled metric-like spaces, by changing the condition [ ℘ ( s , r ) = 0 ⇔ s = r ] by  [ ℘ ( s , r ) = 0 ⇒ s = r ] $$ \bigl[\wp (s,r)=0 \Leftrightarrow s=r\bigr]\quad \text{by ...
Nabil Mlaiki   +3 more
doaj   +1 more source

Some New Observations on Generalized Contractive Mappings and Related Results in b-Metric-Like Spaces [PDF]

open access: gold, 2021
Tatjana Došenović   +4 more
openalex   +1 more source

A COMPLETION THEOREM FOR COMPLEX VALUED S-METRIC SPACE

open access: yesBarekeng
Any complex valued S-metric space where each Cauchy sequence converges to a point in this space is said to be complete. However, there are complex valued S-metric spaces that are incomplete but can be completed.
Mariatul Kiftiah   +3 more
doaj   +1 more source

On Parametric S-Metric Spaces and Fixed-Point Type Theorems for Expansive Mappings

open access: yesJournal of Mathematics, 2016
We introduce the notion of a parametric S-metric space as generalization of a parametric metric space. Using some expansive mappings, we prove a fixed-point theorem on a parametric S-metric space.
Nihal Taş, Nihal Yılmaz Özgür
doaj   +1 more source

METRIC PROJECTIONS IN LINEAR METRIC SPACES

open access: yesDemonstratio Mathematica, 1990
Summary: Various properties of the metric projection are known in normed linear spaces. \textit{G. Pantelidis} [Math. Ann. 184, 30--48 (1969; Zbl 0175.42001)] discussed some of these properties in linear metric spaces. In this paper we also discuss some necessary and sufficient conditions for the metric projections to be continuous and Lipschitzian in ...
openaire   +1 more source

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