The existence of a tensor product is proved in the left quasi-normal band category, and the relationship with the tensor product in the semi-group category is provided.
证明左拟正规带范畴中张量积的存在性，并证明了它与半群张量积的关系，同时给出半格在左拟正规带范畴中张量积与在半格范畴中张量积之间的关系。
The two laws of normal P -complement for finite group have been put forward by analyzing S-quasi normal subgroups.
利用s—拟正规子群给出有限群有正规P—补的两个定理。
Residuals used in normal fitting method, not only takes into account the quasi-geoid model for the geometric properties, but also take into account its physical properties.
所采用的正常高残差拟合方法，既顾及了似大地水准面模型的几何特性，又顾及了其物理特性。
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