"Wo ist die Formel,
wo ist die Formel?"
Z = \sum_{N_{+},N_{-}} \frac{1}{N_{+}!N_{-}!} \prod_i^{N_{+}}\int [d\Omega_i^{+}\, n(\rho_i^{+})] \prod_j^{N_{-}}\int [d\Omega_j^{-}\, n(\rho_j^{-})] \, \exp(-S_{\mathrm{int}}). Z = \sum_{N_{+},N_{-}} \frac{1}{N_{+}!N_{-}!} \prod_i^{N_{+}}\int [d\Omega_i^{+}\, n(\rho_i^{+})] \prod_j^{N_{-}}\int [d\Omega_j^{-}\, n(\rho_j^{-})] \, \exp(-S_{\mathrm{int}}).
Mac Problem