通过研究双对称代数的对偶结构，主要讨论双对称余代数的张量积及双对称代数和双对称余代数之间的对偶关系。
The tensor products of double-symmetric coalgebras and the dual relationships between double-symmetric algebras and double-symmetric coalgebras are discussed.
而且它关于商，归纳极限，与AF -代数做张量积等运算是封闭的。
It is closed under quotients, inductive limits and tensor products with AF-algebras.
基于LEM还得到了处理对应于置换群cg系列问题的黑克代数张量积的方法。
A procedure for dealing with tensor products of Hecke algebras, which corresponds to the CG series of permutation groups, are also formulated based on the LEM.
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