Thanks very much for understanding where and when i have to use the NSolve command.
The Chop@
that you are using in the program means that you are finding the roots that are close to zero, right? What if some roots are far removed from zero?
Also, I would like to ask you one more question, if you can help me with. Actually, I am trying to find solution of an equation which goes like this:
$$1+\sum_{L=-10}^{+10}\frac{\omega_p^2I_L(\lambda_p)e^{-\lambda_p}}{k^2} (1+\frac{\omega}{\sqrt{2}cos{\theta}}Z(\xi p)) +\sum_{L=-10}^{+10}\frac{z^2*nip*mpi*\omega_p^2 I_L(\lambda_i)e^{-\lambda_i}}{k^2 Tip*mpi} (1+\frac{\omega-k*ui*cos\theta }{\sqrt{2}*k*cos{\theta}}Z(\xi i))$$
$$+\frac{2*nep\omega_p^2}{k^2\frac{2\kappa-3}{2\kappa}Tep}(\frac{2\kappa-1}{2\kappa}+\frac{\omega}{k\sqrt{\frac{2\kappa-3 }{\kappa}Tep*mpe}}Z(\xi e))=0$$
where
$\omega_p,nip,mpi,Tip,Tep,mpi,mpe,ui,\theta,nep,\kappa$ are predefined values and
$\lambda _p,\lambda _i,\xi _p,\xi _i,\xi _e$ are as defined in the program, which i am attaching with this reply. And also some of
$\lambda _p,\lambda _i,\xi _p,\xi _i,\xi _e$ are functions of
$k$ and/or
$\omega $. What i want is a plot of
$Re{\omega}$ vs k and
$Im{\omega}$ vs k.
And many thanks for the first reply...
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