C-theorem

In theoretical physics, specifically quantum field theory, C-theorem states that there exists a positive real function, C ( g i , μ ) {displaystyle C(g_{i}^{},mu )} , depending on the coupling constants of the quantum field theory considered, g i {displaystyle g_{i}^{}} , and on the energy scale, μ {displaystyle mu _{}^{}} , which has the following properties: In theoretical physics, specifically quantum field theory, C-theorem states that there exists a positive real function, C ( g i , μ ) {displaystyle C(g_{i}^{},mu )} , depending on the coupling constants of the quantum field theory considered, g i {displaystyle g_{i}^{}} , and on the energy scale, μ {displaystyle mu _{}^{}} , which has the following properties: