Finite separating sets and quasi-affine quotients
Nagata’s famous counterexample to Hilbert’s fourteenth problem shows that the ring of invariants of an algebraic group action on an affine algebraic variety is not always finitely generated. In some sense, however, invariant rings are not far from affine. Indeed, invariant rings are always quasi-aff...
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| Médium: | Journal article |
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Elsevier
2012
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