Changes

The '''Cosmological constant''' is the constant <math>\Lambda</math> of Einstein field equation  

The '''Cosmological constant''' is the constant <math>\Lambda</math> of the Einstein field equation  

:<math>R_{\mu\nu}-(R/2)g_{\mu\nu}+\Lambda g_{\mu\nu}=8\pi G T_{\mu\nu}</math>,

:<math>R_{\mu\nu}-(R/2)g_{\mu\nu}+\Lambda g_{\mu\nu}=8\pi G T_{\mu\nu}</math>,

where <math>R_{\mu\nu}</math> is Ricci's tensor, <math>R</math> is its contraction, <math>g_{\mu\nu}</math> is the metric tensor of spacetime, <math>G</math> is Newton's constant of gravitation, and <math>T_{\mu\nu}</math> is the stress-energy tensor.  (The experimentally derived constant <math>G</math> has to appear in both Newton's formulation of gravity and the [[General relativity]] formulation, since they are compatible.)

where <math>R_{\mu\nu}</math> is Ricci's tensor, <math>R</math> is its contraction, <math>g_{\mu\nu}</math> is the metric tensor of spacetime, <math>G</math> is Newton's constant of gravitation, and <math>T_{\mu\nu}</math> is the stress-energy tensor.  (The experimentally derived constant <math>G</math> has to appear in both Newton's formulation of gravity and the [[General relativity]] formulation, since they are compatible.)