For example, Clojure has a delightful implementation of sets and operations on sets, as well as some quasi-relational algebra thrown in for good measure.
例如，Clojure有一个友好的Set及Set操作实现，以及一些准关系代数实现。
2
This paper presents an algebra method for constructing LDPC code based on Vandermonde matrix, which includes quasi-cyclic Q matrix and the perfect cyclic difference sets.
对准循环Q矩阵和完全循环差集进行了研究，在此基础上提出了一种LDPC码码族的代数构造方法。
3
This paper introduced the concept of a union algebra of BCH-algeba and non-negetive BCH-algebra, and discussed quasi-commutativity of (HP) Union algebra.