commutative lie ring

Thus essay introduces the design and calculate of polassium sulfate production process in the circulate crossover method with the help of ion exchange resin.

本文介绍了离子树脂循环交换法生产硫酸钾工艺设计计算方法,可用于工艺、设备设计和指导生产管理。

Some relations among weak α-skew Armendariz rings,α-rigid rings,α-SC rings and semicommutative rings are studied by some examples.

研究了弱-αskew Armendariz环、-αrigid环、α-SC环以及半交换环的关系。

Then U_n(R) is not a semicommutative ring.

则Un(R)不是半交换环。