scholarly journals FRW Cosmology with Variable G and Λ

2011 ◽  
Vol 50 (5) ◽  
pp. 1602-1613 ◽  
Author(s):  
Mubasher Jamil ◽  
Ujjal Debnath
Keyword(s):  
Frw Cosmology ◽  
Variable G And Λ ◽  
Variable G

Decelerating to accelerating FRW universe with variable G and Λ in conharmonically flat space

New Astronomy ◽  
2019 ◽  
Vol 66 ◽  
pp. 79-87 ◽  
Author(s):  
Manish Goyal ◽  
Rishi Kumar Tiwari ◽  
Anirudh Pradhan
Keyword(s):  
Flat Space ◽  
Variable G And Λ ◽  
Frw Universe ◽  
Variable G

scholarly journals Some Robertson-Walker Models with Variable G and λ

1997 ◽  
Vol 50 (5) ◽  
pp. 893 ◽  
Author(s):  
Abdussattar ◽  
R. G. Vishwakarma
Keyword(s):  
Fluid Flow ◽  
Cosmological Parameters ◽  
Time Varying ◽  
Variable G And Λ ◽  
Flow Vector ◽  
Ricci Collineation ◽  
Frw Models ◽  
Variable G

Some Robertson-Walker (RW) models admitting a contracted Ricci collineation along the fluid flow vector and having time-varying G and Λ are investigated. The nature of the expansion of the models obtained in the cases k = ±l is found to be interchanged from the corresponding standard FRW models. Estimates of the present values of various cosmological parameters are obtained and found to be well within the observational limits.

scholarly journals Noether symmetry approach in matter-dominated cosmology with variable G and Λ

2007 ◽  
Vol 39 (2) ◽  
pp. 189-209 ◽  
Author(s):  
Alfio Bonanno ◽  
Giampiero Esposito ◽  
Claudio Rubano ◽  
Paolo Scudellaro
Keyword(s):  
Noether Symmetry ◽  
Variable G And Λ ◽  
Symmetry Approach ◽  
Variable G
Sign in / Sign up

Export Citation Format

Share Document