Smooth affine surfaces with non-unique โ*-actions
Smooth affine surfaces with non-unique โ*-actions
In this paper we complete the classification of effective <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="double-struck upper C Superscript asterisk"> <mml:semantics> <mml:msup> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="double-struck">C</mml:mi> </mml:mrow> <mml:mo>โ<!-- โ --></mml:mo> </mml:msup> <mml:annotation encoding="application/x-tex">\mathbb {C}^*</mml:annotation> </mml:semantics> </mml:math> </inline-formula>-actions on smooth affine surfaces up to conjugation in the full automorphism group and up to โฆ