Zobrazeno 1 - 10
of 184
pro vyhledávání: '"Mak, M. K.."'
Publikováno v:
Journal of Applied Mathematics and Engineering Vol 8 (2016) Part I, pages 25-34
In this work we obtain an approximate solution of the strongly nonlinear second order differential equation $\frac{d^{2}u}{dt^{2}}+\omega ^{2}u+\alpha u^{2}\frac{d^{2}u}{dt^{2}}+\alpha u\left( \frac{du}{dt}\right)^{2}+\beta \omega ^{2}u^{3}=0$, descr
Externí odkaz:
http://arxiv.org/abs/1707.05369
Scalar-tensor gravitational theories are important extensions of standard general relativity, which can explain both the initial inflationary evolution, as well as the late accelerating expansion of the Universe. In the present paper we investigate t
Externí odkaz:
http://arxiv.org/abs/1612.05446
Publikováno v:
Phys. Rev. D 95, 044031 (2017)
We consider the internal structure and the physical properties of specific classes of neutron, quark and Bose-Einstein Condensate stars in the hybrid metric-Palatini gravity theory, which is a combination of the metric and Palatini $f(R)$ formalisms.
Externí odkaz:
http://arxiv.org/abs/1608.02783
Autor:
Harko, T., Mak, M. K.
Publikováno v:
Astrophysics and Space Science, 361(9), 1-19 (2016)
Obtaining exact solutions of the spherically symmetric general relativistic gravitational field equations describing the interior structure of an isotropic fluid sphere is a long standing problem in theoretical and mathematical physics. The usual app
Externí odkaz:
http://arxiv.org/abs/1607.06877
Publikováno v:
Astrophys Space Sci (2016) 361:52
In this paper, we investigate the Noether symmetries of a generalized scalar-tensor, Brans-Dicke type cosmological model, in which we consider explicit scalar field dependent couplings to the Ricci scalar, and to the scalar field kinetic energy, resp
Externí odkaz:
http://arxiv.org/abs/1512.08054
Autor:
Harko, T., Mak, M. K.
Publikováno v:
J. Math. Phys. 56, 111501 (2015)
We consider quasi-stationary (travelling wave type) solutions to a general nonlinear reaction-convection-diffusion equation with arbitrary, autonomous coefficients. The second order nonlinear equation describing one dimensional travelling waves can b
Externí odkaz:
http://arxiv.org/abs/1510.08163
Publikováno v:
Galaxies 2 (2014) 4, 496-519
We consider the dynamics of a barotropic cosmological fluid in an anisotropic, Bianchi type I space-time in Eddington-inspired Born-Infeld (EiBI) gravity. By assuming an isotropic pressure distribution, we obtain the general solution of the field equ
Externí odkaz:
http://arxiv.org/abs/1410.5213
Autor:
Harko, Tiberiu, Mak, M. K.
Publikováno v:
Mathematical Biosciences and Engineering, vol. 12, pp. 41-69, 2015
We consider quasi-stationary (travelling wave type) solutions to a nonlinear reaction-diffusion equation with arbitrary, autonomous coefficients, describing the evolution of glioblastomas, aggressive primary brain tumors that are characterized by ext
Externí odkaz:
http://arxiv.org/abs/1409.0605
Publikováno v:
Applied Mathematics and Computation, 236, 2014, 184-194
In this paper, the exact analytical solution of the Susceptible-Infected-Recovered (SIR) epidemic model is obtained in a parametric form. By using the exact solution we investigate some explicit models corresponding to fixed values of the parameters,
Externí odkaz:
http://arxiv.org/abs/1403.2160
Publikováno v:
Int.J.Mod.Phys.D24:1550006,2015
A fundamental ingredient in wormhole physics is the presence of exotic matter, which involves the violation of the null energy condition. In this context, we investigate the possibility that wormholes could be supported by quark matter at extreme den
Externí odkaz:
http://arxiv.org/abs/1403.0771