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"text": "$d=1$ 时，海森堡李代数是以 $X,Y,Z$ 为基的三维实向量空间；唯一独立的非零基对括号为 $[X,Y]=Z$，且 $[X,Z]=[Y,Z]=0$。由反对称性还必须有 $[Y,X]=-Z$；$Z$ 与整个代数的元素对易。",
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