The freeness property for locally nilpotent derivations of k[x,y,z]
The freeness property for locally nilpotent derivations of k[x,y,z]
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k[x,y,z] 局部幂零导数的自由度性质
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发表时间:
2020
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通讯作者:
D. Daigle
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作者:
D. Daigle
We prove Freudenburg's Freeness Conjecture:
Let B be the polynomial ring in three variables over a field of characteristic zero, let D : B --> B be a nonzero locally nilpotent derivation, and let A = ker(D). Then B is a free A-module, and there exists a basis $(e_i)_{i \in \mathbb{N}}$ of B such that deg$_D(e_i) = i$ for all $i \in \mathbb{N}$.