本文着重分析了可能出现的平移赝对称形式，并以低级晶系所属的74个空间群为例导出了赝对称形式。
The present paper discussed some possible translational types in detail, and derived the elements of the pseudo-symmetry for the low symmetry crystal systems (74 space groups).
运用基础代数中有关自同构、左平移、正规子群等理论，对群G的全形进行了简单的探讨，证明了几个有关的结论。
By using the theories in basic algebra about automorphism, left translation and normal subgroup, in the holomorph of G is discussed briefly, and several related conclusions are obtained.
半群平移壳理论是半群代数理论的一个重要部分，在半群的理想扩张理论中占有重要地位。
The theory of translational hull of semigroups is an important branch of the algebra theory and plays a basic role in the theory of ideal extensions of semigroups.
半群平移壳在半群的理想扩张理论中占据重要地位。
The translational hull of a semigroup plays an important role in the theory of ideal extensions of semigroups.
本文主要研究超富足半群的平移壳问题。
This paper mainly focuses on the study of the translational hull of superabundant semigroup.
本文主要研究超富足半群的平移壳问题。
This paper mainly focuses on the study of the translational hull of superabundant semigroup.
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