# General Relativity and Gravitation

General Relativity and Gravitation > 2019 > 51 > 9 > 1-15

*G*and $$\Lambda $$ Λ . Using renormalization group, variable

*G*behaves as a minimally coupled filed (not the scalar–tensor theory) and variable $$\Lambda $$ Λ can be interpreted as a potential function. The point Lagrangian for this model in the background of...

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*f*(

*R*) theory with the data provided by the mission, Gravity Probe–B. We find the constraint, $$|a_2| < 1.33\times 10^{12}~{\mathrm {m}}^2$$ |a2|<1.33×1012m2 , where $$a_2$$ a2 is the coefficient assessing the strength of the lowest order correction to the Einstein–Hilbert action for a metric

*f*...

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*n*, magnetic flux $$\Phi $$ Φ of the ring, angular velocity $$\omega $$ ω associated to the noninertial...

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