建立了一族可和序列效应代数的水平和上具有序列积的充分必要条件,进而给出了由序列效应代数的水平和构造序列效应代数的一种方法。
A sufficient and necessary condition for the existence of sequential pruducts on a horizontal sum of sequential effect algebras is established and a useful method for constructing a sequential effect algebra from a horizontal sum of sequential effect algebras is given.