# Tagged Questions

**5**

votes

**1**answer

417 views

### permutation of projective limits with inductive limits

Hi everybody,
I have a lack of references concerning projective limits and injective limits. Up to my faults in Bourbaki there are only proj and inj limits indexed by a partially ordered set (not a ...

**10**

votes

**1**answer

1k views

### Is every ring the direct limit of Noetherian rings?

Are there any examples of commutative rings that do not occur as direct limits of Noetherian rings?

**8**

votes

**2**answers

1k views

### Exactness of filtered colimits

Are filtered colimits exact in all abelian categories?
In Set, filtered colimits commute with finite limits. The proof carries over to categories sufficiently like Set (i.e. where you can chase ...