%-------------------------------------------------------------------------------------------------------------------
\begin{eqnarray}
\hbar\omega
G^+_{aB}(\omega)&=&\frac{i\hbar}{2\pi}\langle[\hat{S}^{+(a)}_{m,\rho},\hat{B}_{m',\rho'}]\rangle
+\sum_{\delta_{||}}J(\langle\langle\hat{S}_{m,\rho}^{z(a)}\hat{S}^{-(b)}_{m,\rho+\delta_{||}}|\hat{B}_{m',\rho'}\rangle\rangle_{\omega}
+\nonumber\\
+g\langle\langle\hat{S}_{m,\rho}^{+(a)}\hat{S}_{m,\rho+\delta_{||}}^{z(b)}}|\hat{B}_{m',\rho'}\rangle\rangle_{\omega})+
J'(\langle\langle\hat{S}_{m,\rho}^{z(a)}\hat{S}^{-(b)}_{m+1,\rho}|\hat{B}_{m',\rho'}\rangle\rangle_{\omega}+
\langle\langle\hat{S}_{m,\rho}^{z(a)}\hat{S}^{-(b)}_{m-1,\rho}|\hat{B}_{m',\rho'}\rangle\rangle_{\omega}+\nonumber\\
&+&\langle\langle\hat{S}_{m,\rho}^{+(a)}\hat{S}^{z(b)}_{m+1,\rho}|\hat{B}_{m',\rho'}\rangle\rangle_{\omega}+
\langle\langle\hat{S}_{m,\rho}^{+(a)}\hat{S}^{z(b)}_{m-1,\rho}|\hat{B}_{m',\rho'}\rangle\rangle_{\omega})\nonumber\\
\end{eqnarray}
%-------------------------------------------------------------------------------------------------------------------
Koristio sam ipak ovakve oznake da bi mi se odmah numerisale jednacine i najednom ovo javlja gresku, a pre toga nigde nije javljalo. Pise
missing \cr inserted
Sta bi moglo biti u pitanju? Unapred hvala na odgovoru!
Pokusao sam da nadjem gresku, ali ne uspevam!