Solution
= Solution
<Characteristic-function convergence theorem> says $X_n\Rightarrow X$ iff $\Phi_{X_n}(t)\to\Phi_X(t)$ for all $t$, where the limiting <function> is continuous at zero.
= Solution
<Characteristic-function convergence theorem> says $X_n\Rightarrow X$ iff $\Phi_{X_n}(t)\to\Phi_X(t)$ for all $t$, where the limiting <function> is continuous at zero.