blush again

BSEdyn.tex

@@ -368,9 +368,8 @@ After projecting onto \titou{$\phi_a^*(\bx_1) \phi_i(\bx_{1'})$}, one obtains th
 	\frac{ \phi_a^*(\bx_3) \phi_i(\bx_4)  } {   \Oms - (  \e{a} - \e{i} )  + i \eta }   
 	\times \qty[ \theta( \tau ) e^{i ( \e{i} + \hOms) \tau } + \theta( - \tau ) e^{i (\e{a} - \hOms \tau) }  ]  
 \end{multline}
-with $\tau = \tau_{34}$. 
-and where we adopt the iWe used chemist notations with $(i,j)$ indexing occupied orbitals and $(a,b)$ virtual ones. (T2: I wouldn't call that chemist notations...)}
-
+with $\tau = \tau_{34}$. From then on, 
+ $(i,j)$ index  occupied orbitals and $(a,b)$ virtual ones. 
 Adopting now the $GW$ approximation for the exchange-correlation self-energy, \ie, 
 \begin{equation}
 	\Sigma_\text{xc}^{\GW}(1,2) = i G(1,2) W(1^+,2),