常见例句quasi-cocommutative weak bialgebra 拟余交换双代数The Structure of Crossed Coproduct Bialgebra and Hopf Algebra 交叉余积双代数结构和Hopf代数bialgebra 双代数bitwisted bialgebra 双扭双代数comodule bialgebra 余模双代数 返回 bialgebraic