Publication Date:
2020-06-02
Description:
We develop a general theory of partial morphisms in additive exact categories which extends the model theoretic notion introduced by Ziegler in the particular case of pure-exact sequences in the category of modules over a ring. We relate partial morphisms with (co-)phantom morphisms and injective approximations and study the existence of such approximations in these exact categories.
Print ISSN:
1664-3607
Electronic ISSN:
1664-3615
Topics:
Mathematics