Purity and injectivity in accessible cat
✍
Michel Hébert
📂
Article
📅
1998
🏛
Elsevier Science
🌐
English
⚖ 336 KB
We introduce a strengthening of the concept of purity, which may be more appropriate in the context of accessible categories (and which we prove to be equivalent to the usual one in locally presentable categories). We then use it to obtain a characterization of (cone) injectivity classes which, in p