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Results tagged with reference-request
Search options questions only
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user 533379
This tag is used if a reference is needed in a paper or textbook on a specific result.
6
votes
1
answer
202
views
Resource on how the definitions of subobjects for various categories can vary
I am looking for a reference on the different possible definitions of subobjects. According to a particular friend of mine, subobjects should be at least monomorphisms (up to slice isomorphism) and at …
- 591
1
vote
0
answers
167
views
Isomorphism classes of finite $\mathbb{N}$-groups
Where can I find resources on isomorphism classes of finite $\mathbb{N}$-groups, i.e. groups acted on by the monoid $(\mathbb{N}, +)$?
I edited this question to be more focused on what I'm interested …
- 591
11
votes
0
answers
399
views
Is there a theory of completions of semirings similar to $I$-adic completions of rings?
Let $L = \text{Con } (\mathbb{N}, 0, +) \setminus \Delta$ be the lattice of monoid congruences on the naturals, excluding the trivial congruence. As it happens, every $\theta \in L$ is the meet of som …
- 591