https://s0.wp.com/latex.php?latex=%5Cdisplaystyle+%5Cmathbb%7BE%7D%5BW%5D+%5Cgeq+%5Calpha+%5Cfrac12+%5Csum_%7Bi%3Cj%7Dw_%7Bij%7D%281-v_i%5ETv_j%29+%5Cgeq+%5Calpha+%5Crho_G%2C+%5C+%5C+%5C+%5C+%5C+%284%29&bg=ffffff&fg=000000&s=0