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Let $\mathbb{R}=(-\infty,\infty)$, and let $Q\in C^1(\mathbb{R}):\mathbb{R}\rightarrow \mathbb{R^+}=[0,\infty)$ be an even function, which is anexponent. We consider the weight $w_\rho(x)=|x|^{\rho} e^{-Q(x)}$,$\rho\geqslant 0$, $x\in \mathbb{R}$, and then we can construct the orthonormalpolynomials $p_{n}(w_\rho ^2;x)$ of degree n for $w_\rho ^2(x)$. In this paperwe obtain $L_p$-convergence theorems of even order Hermite-Fej\'erinterpolation polynomials at the zeros $\left\{x_{k,n,\rho}\right\}_{k=1}^n$ of$p_{n}(w_\rho ^2;x)$.

$L_p$-Convergence of higher order Hermite or Hermite-Fej\'er interpolation polynomials with exponential-type weights