《Algebra》
· 第 90-91 页 · Chapter II，Section 4「The Action of a Group on a Set」，Corollary 4.7(i) 及其后定名段
For each $g\in G$, conjugation by $g$ induces an automorphism of $G$. The automorphism $T_g$ of Corollary 4.7(i), given by $T_g(x)=gxg^{-1}$, is called the inner automorphism induced by $g$.
