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In this paper, we will study the topological centers of $n-th$ dual of Banach$A-module$ and we extend some propositions from Lau and $\ddot{U}lger$ into$n-th$ dual of Banach $A-modules$. Let $B$ be a Banach $A-bimodule$. By usingsome new conditions, we show that ${{Z}^\ell}_{A^{(n)}}(B^{(n)})=B^{(n)}$ and${{Z}^\ell}_{B^{(n)}}(A^{(n)})=A^{(n)}$. We also have some conclusions in dualgroups.

The Topological Centers Of Module Actions