Introduces the relative Rees algebra of Ga,S-actions on relative affine schemes, establishes its basic properties, and applies it to examples from locally nilpotent derivations and families of affine threefolds.
Hedén, Affine extensions of principal additive bundles over a punct ured surface, Transform
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Rees algebras of additive group actions
Introduces the relative Rees algebra of Ga,S-actions on relative affine schemes, establishes its basic properties, and applies it to examples from locally nilpotent derivations and families of affine threefolds.