Results 11 to 20 of about 53 (39)

A note on exp-function method combined with complex transform method applied to fractional differential equations

Advances in Nonlinear Analysis, 2015
In this article, the fractional derivatives in the sense of modified Riemann–Liouville and the exp-function method are used to construct exact solutions for some nonlinear partial fractional differential equations via the nonlinear fractional Liouville ...
Guner Ozkan, Bekir Ahmet, Bilgil Halis
doaj   +1 more source

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

New Vacuum Solutions for Quadratic Metric-Affine Gravity - a Metric Affine Model for the Massless Neutrino?

, 2010
AMS Subj. Classification: 83C15, 83C35In this paper we present an overview of our research that was presented at theMASSEE International Congress on Mathematics MICOM 2009 in Ohrid, Macedonia.
Pasic, Vedad
core  

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