<math> ▽_{θ_i} L_i ( θ_i ) = E_{s , a , r , s ′ }[ ( r + γ max _{a ′ }Q ( s ′ , a ′ , θ_{i}^{−} ) − Q ( s , a , θ_{i }) ) ▽ θ_i Q ( s , a , θ_i ) ] </math> | <math> ▽_{θ_i} L_i ( θ_i ) = E_{s , a , r , s ′ }[ ( r + γ max _{a ′ }Q ( s ′ , a ′ , θ_{i}^{−} ) − Q ( s , a , θ_{i }) ) ▽ θ_i Q ( s , a , θ_i ) ] </math> |