regular element of a Lie algebra

例句：

1. 1.The regular elements of a Lie algebra are the commutative and associative properties.
   Lie代数的正规元素是交换律和结合律。
2. 2.In mathematics, the regular elements of a group are the elements that commute with every other element in the group.
   在数学中，一个群的正规元素是与群中每一个其他元素都相乘的元素。
3. 3. The regular elements of a polynomial can be used to simplify calculations by factoring out constants.
   多项式的正规元素可以用来简化计算，通过提取常数项。