We characterize proper holomorphic self-mappings 𝔾₂ → 𝔾₂ for the symmetrized bidisc 𝔾₂ = {(λ₁+λ₂,λ₁λ₂): |λ₁|,|λ₂| < 1} ⊂ ℂ².
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-ap84-2-8, author = {Armen Edigarian}, title = {Proper holomorphic self-mappings of the symmetrized bidisc}, journal = {Annales Polonici Mathematici}, volume = {83}, year = {2004}, pages = {181-184}, zbl = {1098.32007}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap84-2-8} }
Armen Edigarian. Proper holomorphic self-mappings of the symmetrized bidisc. Annales Polonici Mathematici, Tome 83 (2004) pp. 181-184. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap84-2-8/