First-order energy correction
= First-order energy correction
{title2=$E_n^{(1)}$}
The first-order energy correction is the coefficient of the perturbation parameter in the expansion of an energy eigenvalue.
= First-order energy correction
{title2=$E_n^{(1)}$}
The first-order energy correction is the coefficient of the perturbation parameter in the expansion of an energy eigenvalue.