对合的共轭元素 conjugate elements of an involution

有对合的除环 division ring with an involution

具对合算子的方程 Equations with involutive operators

对油的混合能力 Homogeneity and Miscibility

观测对象的集合 A collection of objects observed

集合的绝对补 absolute complement of a set

对应的叠合 coincidence of a correspondence

环的对合 involution of a ring

查对相符合的号数 check the number