Formula_14975

\[\begin{gathered}\rho_{g_{1}, g_{2}, g_{3}} \cdot \rho_{g_{2}, g_{3}}=\rho_{g_{1} g_{2}, g_{3}} \rho_{g_{1}, g_{2}}^{g_{3} \sigma} ; \\\alpha^{g_{1} \sigma \cdot g_{2} \sigma}=\rho_{g_{1}, g_{2}}^{-1} \alpha^{\left(g_{1} g_{2}\right) \sigma_{\rho_{g_{1}}, g_{2}}}\end{gathered}\]