Results 61 to 70 of about 102,344 (170)

Nonlinear potential theory on metric spaces

Illinois Journal of Mathematics, 2002
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Kinnunen, Juha, Martio, Olli
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Neutrosophic Tri-metric Space and Its Topological Properties [PDF]

Neutrosophic Sets and Systems
We introduce neutrosophic tri-metric spaces as a novel mathematical framework that generalizes classical metric space theory by incorporating three interrelated distance functions with neutrosophic compo nents representing truth, indeterminacy, and ...
Jamal Oudetallah, Wedad Alharbi, Rehab Alharbi, Ala Amourah, Abdullah Alsoboh, Faisal Al-Sharqi, Tala Sasa   +6 more
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String Theory Explanation of Galactic Rotation Found Using the Geodesic Constraint

Advances in High Energy Physics, 2019
The unique spherically symmetric metric which has vanishing Weyl tensor, is asymptotically de-Sitter, and can model constant galactic rotation curves is presented. Two types of field equations are shown to have this metric as an exact solution. The first
Mark D. Roberts
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Quantum Field Theory with Indefinite Metric [PDF]

Progress of Theoretical Physics, 1962
Yokoyama' s model, a convergent model in quantum field theory with indefinite metric, is investigated in a simplified version. Five spinor fields in the model, one physical and the remainder unphysical, are replaced by the corresponding neutral scalar fields, and a physical neutral scalar field is replaced by a prescribed external field. Apart from the
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Fundamental Characteristics of the Product-Operated Metric Spaces

Axioms
In the field of metric fixed point theory, there are several generalized or modified types of metric space. One such type is called multiplicative metric space. It was initially introduced as a modified version of the metric space, but was later found to
Muhammad Usman Ali, Salvatore Sessa, Yahya Almalki, Monairah Alansari   +3 more
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On Generalized (α-ψ)-Contraction With Rational Contraction Type on Generalized Metric Space Endowed With the Orthogonal Direct Sum

Journal of Mathematics
This paper explores fixed point theory, focusing on (α-ψ)-contraction-type operators defined on complete generalized metric spaces with an orthogonal direct sum structure.
Ghadah Albeladi, Saleh Omran
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Discrimination of metric theories

12 pages, 6 figures and 1 ...
Lobo, F. J., Rivera-Tapia, M., Rubilar, G., Jiménez, O., Delgado, A.   +4 more
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One-variable metrics in string theory

Physical Review D
Exact solutions depending on one variable of gravitational theory with antisymmetric tensor and a coupled dilaton field are obtained in arbitrary space-time dimensions. These solutions are relevant to M theory, type IIA, and type IIB supergravity theories in various space-time signatures.
M. Fakhredin, W. A. Sabra
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ℐ-sn-metrizable spaces and the images of semi-metric spaces

Open Mathematics
The theory of generalized metric spaces is an active topic in general topology. In this article, we utilize the concepts of ideal convergence and networks to discuss the metrization problem and the mutual classification problem between spaces and ...
Zhou Xiangeng, Liu Fang, Liu Li, Lin Shou   +3 more
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Metrical Theories

, 2023
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