Results 21 to 30 of about 90,571 (200)

Darboux Vector in Four-Dimensional Space-Time

open access: yesAdvances in Mathematical Physics, 2022
As the space-time model of the theory of relativity, four-dimensional Minkowski space is the basis of the theoretical framework for the development of the theory of relativity.
Na Hu, Tingting Zhang, Yang Jiang
doaj   +1 more source

Reverse Minkowski Inequalities Pertaining to New Weighted Generalized Fractional Integral Operators

open access: yesFractal and Fractional, 2022
In this paper, we obtain reverse Minkowski inequalities pertaining to new weighted generalized fractional integral operators. Moreover, we derive several important special cases for suitable choices of functions. In order to demonstrate the efficiency of
Rozana Liko   +3 more
doaj   +1 more source

Constructive Existence of Minkowski Functionals [PDF]

open access: yesProceedings of the American Mathematical Society, 1992
In Bishop’s constructive mathematics, the framework of this paper, there are many situations where we cannot easily prove the existence of functionals whose existence is a trivial consequence of classical logic. One such functional is the Minkowski functional of a convex absorbing set.
openaire   +2 more sources

New Minkowski and related inequalities via general kernels and measures

open access: yesJournal of Inequalities and Applications, 2023
In this article, we introduce a class of functions U ( p ) $\mathfrak{U}(\mathfrak{p})$ with integral representation defined over a measure space with σ-finite measure. The main purpose of this paper is to extend the Minkowski and related inequalities by
Sajid Iqbal   +4 more
doaj   +1 more source

Structure Functions of Pseudo Null Curves in Minkowski 3-Space

open access: yesMathematics, 2020
In this work, the embankment surfaces with pseudo null base curves are investigated in Minkowski 3-space. The representation formula of pseudo null curves is obtained via the defined structure functions and the k-type pseudo null helices are discussed ...
Jinhua Qian   +3 more
doaj   +1 more source

Thermal Wightman Functions and Renormalized Stress Tensors in the Rindler Wedge [PDF]

open access: yes, 1995
The Wightman functions in the Rindler portion of Minkowski space-time are presented for any value of the temperature and for massless spin fields up to s=1 and the renormalized stress tensor relative to Minkowski vacuum is discussed. A gauge ambiguity in
Allen   +33 more
core   +2 more sources

A two-dimensional Minkowski ?(x) function

open access: yesJournal of Number Theory, 2004
44 pages, 12 ...
Beaver, Olga R., Garrity, Thomas
openaire   +2 more sources

On Ball Numbers

open access: yesMathematics, 2019
We first shortly review, in part throwing a new light on, basics of ball numbers for balls having a positively homogeneous Minkowski functional and turn over then to a new particular class of ball numbers of balls having a Minkowski functional being ...
Wolf-Dieter Richter
doaj   +1 more source

Tzitzeica-Type centro-affine invariants in Minkowski spaces

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012
In this article we introduce three centro-affine invariant functions in Minkowski spaces. Tzitzeica curves and Tzitzeica surfaces may be defined in this new context.
Bobe Alexandru   +2 more
doaj   +1 more source

Minkowski Functionals in Cosmology

open access: yesProceedings of the International School of Physics “Enrico Fermi”, 1995
Minkowski functionals provide a novel tool to characterize the large-scale galaxy distribution in the Universe. Here we give a brief tutorial on the basic features of these morphological measures and indicate their practical application for simulation data and galaxy redshift catalogues as examples.
Schmalzing J., Kerscher M., Buchert T.
openaire   +2 more sources

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