Dual of a Comma Category
106370
How do we construct the coslice category $C / \bf{C}$ given $\textbf{C}/C$ and prove that the two are equal?
67524
Direct products in the category Rel
156178
Do counit-unit adjunctions have the expected universal properties?
127886
Artin's lemma and some morphisms.
29637
$\sigma$-algebra of sets that are both $G_\delta$ and $F_\sigma$
132137
Concrete Categories Where Epis are Just Surjections
8417
Natural $(R/I)$-module structure for an $R$-module $M$ annihilated by $I$
78211
Equivalence of categories preserves cartesian closedness
154762
Dual space of a finite dimensional normed space
144122
A problem about an $R$-module that is both injective and projective.
74675
Why is there no natural isomorphism between $V$ and its dual?
140340
Left and right R-modules
63104
Dual cone of $K = \{(x,t) \mid \| \boldsymbol{x} \|_1 \le t \}$
122559
Some questions on abelian category
74617
Equivalent conditions for a preabelian category to be abelian
83744
is there a property of a category that is preserved by category isomorphism, but not equivalence?
135369
Equivalence between derived categories preserve distinguished triangles