摘要
本文改正了参考文献[1]中命题4.1前半部分证明中的一个错误,并给出了其证明中省略的细节.
In this note, we correct an error in the former proof of proposition 4.1 on reference book [ 1 ], and give the detail deleted in its proof.
出处
《北京工商大学学报（自然科学版）》
CAS
2007年第2期80-80,84,共2页
Journal of Beijing Technology and Business University:Natural Science Edition
关键词
预层
预层的相伴层
泛映射
pre-sheaf
sheafification of presheaf
universal mapping property
