Explicit description for the automorphism group of the Fornæss domain

Motivated by the Kohn–Nirenberg domain, J.E. Fornæss considered the germ of a domain near the origin in C2C2 such thatΩt={(z,w)∈C2:Rew+|zw|2+|z|6+t|z|2Re(z4)<0} to study the holomorphic peak function that is smooth up to the boundary (Fornæss, 1977 [6]). J.E. Fornæss proved that for 1