证明了任意一个(A, B)不变子空间一定能分解成一些根子空间的直和。

It is proved that the (a, b) invariant subspaces can be always decomposed into a direct-sum form of some radical subspaces.

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文章讨论了线性空间的根子空间分解，并对线性空间分解成根子空间的直和给出了较为初等的证明。

In this paper, we have discussed root subspace decomposition of linear space, and for the linear space have decomposed direct sum of root subspace, a primary proof is given.

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