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15
Math.TechQA.Club
2026-03-19 19:48:53
94
Views
$\Pi_f$ for a morphism $f$ between simplicial sets
Published on
19 Mar 2026 - 19:48
#category-theory
#simplicial-stuff
#pullback
#slice-category
360
Views
An elementary question about slice categories
Published on
22 Mar 2026 - 16:40
#category-theory
#slice-category
181
Views
Show that $\text{C}/c \cong (c/(\text{C}^{\text{op}}))^{\text{op}}$
Published on
22 Mar 2026 - 16:29
#proof-writing
#category-theory
#duality-theorems
#slice-category
354
Views
Proving that a slice category is still a category
Published on
25 Mar 2026 - 4:19
#category-theory
#slice-category
758
Views
What is the product in a slice category like?
Published on
22 Mar 2026 - 18:09
#category-theory
#slice-category
167
Views
How is this a commutative diagram?
Published on
23 Mar 2026 - 11:39
#abstract-algebra
#category-theory
#slice-category
131
Views
Is $\mathbf{Cat}/\mathcal{C}\simeq\mathbf{Cat}^{\mathcal C^\mathrm{op}}$ when $\mathcal C$ is a $1$-category?
Published on
23 Mar 2026 - 18:18
#category-theory
#higher-category-theory
#fibration
#grothendieck-construction
#slice-category
299
Views
How to find initial object of the category of pointed rings?
Published on
24 Mar 2026 - 10:34
#ring-theory
#category-theory
#ring-homomorphism
#slice-category
1.1k
Views
Completeness of over category (slice)
Published on
23 Mar 2026 - 13:37
#category-theory
#slice-category
#forgetful-functors
59
Views
What does a morphism in the category $\mathsf{C}_{\alpha, \beta}$ correspond to?
Published on
22 Mar 2026 - 16:31
#category-theory
#slice-category
163
Views
Filtered colimit and directed colimit, Example
Published on
22 Mar 2026 - 22:19
#category-theory
#limits-colimits
#slice-category
133
Views
Cartesian closed coslice categories
Published on
25 Mar 2026 - 4:35
#category-theory
#slice-category
207
Views
How does the forgetful functor from $\mathbf{C}/C$ to $\mathbf{C}$ forgets the object $C$?
Published on
17 Mar 2026 - 12:26
#category-theory
#slice-category
#forgetful-functors
58
Views
In a category ${\rm FinSet}/S$, what operation could find the cospan with smallest domain at the coapex?
Published on
24 Mar 2026 - 2:41
#category-theory
#slice-category
322
Views
Slice category and free objects
Published on
25 Mar 2026 - 4:44
#category-theory
#adjoint-functors
#slice-category
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