Abstract
We consider normal affine surfaces $X$ with étale endomorphisms. It is proved that if $X$ has at least one singular point which is not a quotient singular point then such an endomorphism is an isomorphism.
Citation
Rajendra Vasant Gurjar. Masayashi Miyanishi. "The jacobian problem for singular surfaces." J. Math. Kyoto Univ. 48 (4) 757 - 764, 2008. https://doi.org/10.1215/kjm/1250271317
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