Fields of Ga Invariants are Ruled
Canadian mathematical bulletin, Tome 37 (1994) no. 1, pp. 37-41

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The quotient field of the ring of invariants of a rational Ga action on Cn is shown to be ruled. As a consequence, all rational Ga actions on C4 are rationally triangulable. Moreover, if an arbitrary rational Ga action on Cn is doubled to an action of Ga × Ga on C2n, then the doubled action is rationally triangulable.
DOI : 10.4153/CMB-1994-006-0
Mots-clés : 14L30, 20G20, 12F20
Deveney, James K.; Finston, David R. Fields of Ga Invariants are Ruled. Canadian mathematical bulletin, Tome 37 (1994) no. 1, pp. 37-41. doi: 10.4153/CMB-1994-006-0
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     title = {Fields of {Ga} {Invariants} are {Ruled}},
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     year = {1994},
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     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1994-006-0/}
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