restriction of an automorphism
31421
Transpose inverse automorphism is not inner
154142
Finding a specific basis for an endomorphism
61635
Proving AM-GM with induction
134070
$g$ a restriction of a homeomorphic function $f$, $g$ also homeomorphic?
77297
Counterexample for $A,B\triangleleft G,G/A\cong B \Rightarrow G/B\cong A$
78222
Can any monomorphism of a subfield of a splitting field be extended to an automorphism?
27746
Autohomeomorphism of the unit disk which is constant on the boundary, and which takes 0 to a prescribed point
117151
Conformal automorphism of unit disk that interchanges two given points
39866
Automorphism group of the quaternion group
146278
Automorphism group of direct product of groups
133660
When can a homomorphism be determined entirely by its generators
158396
Finite $G$ with involutory automorphism $\alpha$ with no nontrivial fixed points. Proving properties of $\alpha$.
4228
Prove that the only automorphism of $\mathbb{Q}(\sqrt[3]{2})$ is the identity automorphism.
126790
Basic Isomorphism Question
135039
${\rm Aut}(G)$ is cyclic $\implies G$ is abelian
78950
Does this map extend to a unique automorphism of the polynomial ring of an integral domain?
140583
What does it mean for something to hold "up to isomorphism"?