On Invariant Subspaces of Locally Finite Derivations
On Invariant Subspaces of Locally Finite Derivations
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关于局部有限导数的不变子空间
DOI:
10.1112/blms/12.5.374
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发表时间:
1980
影响因子:
0.9
通讯作者:
J. Krempa
中科院分区:
文献类型:
--
作者:
J. Krempa
It is easily seen that this defines a linear transformation. It follows from the lemma that this is an endomorphism of the algebra. This is an automorphism since exp (—d—£) is the inverse transformation. Thus exp (d—^)(x) 6J for any xe J. Now, if we replace d by nd, n^ 1, then for any aeFwe get Pa {A, d)= P, n {A, nd) and so exp (nd—Q (x) eJ. If xe Pa n J and (d—a) fc (x)= 0 then for any n^ 1, i= 0'•