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magma
  • Member for 10 years, 7 months
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4 votes
1 answer
592 views

Definition of the Diagonal functor

1 vote
1 answer
56 views

SupLat and InfLat

5 votes
2 answers
963 views

Two point topological space

4 votes
1 answer
158 views

Adjoint situation induced on presheaves

5 votes
1 answer
1k views

Rel: the category of relations

3 votes
0 answers
72 views

Size of the collection of morphisms of a category

12 votes
1 answer
480 views

Zorn's lemma in categorical language

5 votes
1 answer
494 views

Being a monomorphism described as a universal property

2 votes
2 answers
189 views

Existence of non-identity natural transformations $\tau:F \to F $

7 votes
1 answer
1k views

Adjoint pairs, triplets and quadruplets