μ,rs/2\mu_{,} r s / 2μ,rs/2
μ,2rs/2\mu_{,}^{2} \mathrm{rs} / 2μ,2rs/2
μ0,rg\sqrt{\mu_{0}, \mathrm{rg}}μ0,rg
μ,rg\mu_{,} \mathrm{rg}μ,rg