The complement of the union of principal invariant cylinders in an affine variety with a Ga-action equals the zero locus of the plinth ideal of the corresponding locally nilpotent derivation.
A note on locally nilpotent derivations and variables ofk[X, Y, Z]
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Cylinders and the zero locus of the plinth ideal
The complement of the union of principal invariant cylinders in an affine variety with a Ga-action equals the zero locus of the plinth ideal of the corresponding locally nilpotent derivation.