subalgebra

例句：

1. 1. In mathematics, a subalgebra is a set of polynomials that share the same degree but different coefficients.
   在数学中，一个子代群是由具有相同度数但系数不同的多项式组成的集合。
2. 2. The study of subalgebras has applications in cryptography and coding theory.
   子代群的研究在密码学和编码理论中有应用。
3. 3.Subalgebras are essential tools for studying group actions and their properties.
   子代群是研究群作用及其性质的必备工具。