The symmetry groups to which real molecules may belong are very numerous.
真实分子可能属于的对称群是非常多的。
The subjects to be covered include groups, vector Spaces, linear transformations, symmetry groups, bilinear forms, and linear groups.
涵盖的主题包括群、向量空间、线性转换、对称群、双线性结构、线性群等。
Characters of symmetry groups is a powerful maths instrument, it is very significative to study and bring forward its simple computation method.
对称群特征标是有力的数学工具，研究并提出其简单计算方法是很有意义的。
The five non-simple groups—dubbed“exceptional” in their complexity and symmetry—are harder to envisage and, for almost 120 years, the details of the mostintricate of these have lain beyond reach.
五族非平凡群具有复杂性和对称性的特例，也更加难于预测。其中复杂部分的细节问题已经困扰了人们近120年。
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).
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 space-time symmetry, the internal symmetry and the relation between the symmetries and the groups are discussed.
分别讨论了时空对称性和内部对称性及其与数学中的群的关系。
This course concentrates on the chemistry of non-transition elements and their compounds, with emphasis on symmetry, bonding, periodic properties and the descriptive chemistry of selected groups.
本课程集中研究化学中的非过渡元素及其化合物，并强调其对称，结合，周期性及性质的描述。
We recall the characteristics of the groups with hyperbolic symmetry and improve the IFS iterated function systems which are used to construct the classical fractal sets in the Euclidian plane.
方法分析双曲对称群的特点，改造欧式平面上构造经典分形的IFS迭代函数系，利用这种迭代函数系与双曲平面对称变换构造出组合IFS，通过随机挑选组合IFS中的仿射变换，构造双曲排列的分形集。
We recall the characteristics of the groups with hyperbolic symmetry and improve the IFS iterated function systems which are used to construct the classical fractal sets in the Euclidian plane.
方法分析双曲对称群的特点，改造欧式平面上构造经典分形的IFS迭代函数系，利用这种迭代函数系与双曲平面对称变换构造出组合IFS，通过随机挑选组合IFS中的仿射变换，构造双曲排列的分形集。
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