Results 11 to 20 of about 38 (38)

A Special Universe and its Massless Scalar Field Mathematical Structure

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
The present paper highlights an exotic universe having a metric which is partially suggested by the metric of an universe without time seen in [2]. The new metric is globally defined and depends on an exotic matter created by some classical waves.
Boskoff Wladimir-Georges, Nicola Aurelian   +1 more
doaj   +1 more source

A mathematical note about a FLRW universe embedded in a universe without time

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
In this paper we propose to study a six-dimensional Friedmann-Lemaître-Robertson-Walker (FLRW) universe without time. The way we study this timeless universe is the classic one: we highlight future oriented time-like loops and closed chains of future ...
Sburlan Cristina
doaj   +1 more source

Penrose junction conditions with Λ : geometric insights into low-regularity metrics for impulsive gravitational waves. [PDF]

Gen Relativ Gravit, 2022
Podolský J, Steinbauer R.
europepmc   +1 more source

Analysis of transmission dynamics of COVID-19 via closed-form solutions of a susceptible-infectious-quarantined-diseased model with a quarantine-adjusted incidence function. [PDF]

Math Methods Appl Sci, 2021
Naz R, Al-Raeei M.
europepmc   +1 more source

Complete classification of spatial surfaces with parallel mean curvature vector in arbitrary non-flat pseudo-Riemannian space forms

Open Mathematics, 2009
Chen Bang-Yen
doaj   +1 more source

The failure of the Ehlers-Kundt conjecture in the impulsive case. [PDF]

Gen Relativ Gravit
Frauenberger ML, Grant JDE, Steinbauer R.   +2 more
europepmc   +1 more source

Cut-and-paste for impulsive gravitational waves with Λ: the mathematical analysis. [PDF]

Lett Math Phys
Sämann C, Schinnerl B, Steinbauer R, Švarc R.   +3 more
europepmc   +1 more source

Cantrell Syndrome and the One Health Perspective: A Unified Review of Human and Comparative Cases. [PDF]

Vet Sci
Martín-Alguacil N, Avedillo L.
europepmc   +1 more source

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New perception of the exact solutions of the 3D-fractional Wazwaz-Benjamin-Bona-Mahony (3D-FWBBM) equation

Journal of Interdisciplinary Mathematics, 2021
Ahmet Bekir, Emad Zahran, Maha S M Shehata   +2 more
exaly  

Stratified equatorial flows in the $$\beta $$-plane approximation with a free surface

Monatshefte Fur Mathematik, 2022
Jinrong Wang, Michal Fečkan, Wang Jinrong   +2 more
exaly