摘要
用反例指明"BCI-代数〈X;*,0〉的非空子集I是一个理想当且仅当 x,y∈I,A(x,y)={x∈X:z*x≤y}∈I",其充分性是不成立的。此外,指出记号x*ny和xn*y的2种记法不等价的。
Let I is a nonempty subset of BCIalgebra <X,*,0>,and I is a ideal if and only if x,y∈I,A(x,y)={x∈X:z*x≤y}∈I,its sufficient condition is not held by citing an example as instance,and it is proved that the symbol x*ny and xn*y is not equivalent.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2003年第1期26-27,共2页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
