2 problems

Let $K$ be a field of characteristic $0$, let $K[x,y,z]$ be the commutative polynomial algebra, and let $K\langle x,y,z\rangle$ be the free associative algebra. An automorphism is…

Let $K$ be a field of characteristic $0$, and let … be the Anick automorphism of $K\langle x,y,z\rangle$. An automorphism is wild if it does not belong to the group generated by el…