Question

Why the empty set isn't a terminal object in the $\mathcal{SET}$ as well as it is an initial object?

score 336 · Answer 1 · 2026-03-29 20:18:48

336

Views

Why the empty set isn't a terminal object in the $\mathcal{SET}$ as well as it is an initial object?

Published on 29 Mar 2026 - 20:18

score 52 · Answer 2 · 2026-03-25 08:10:03

52

Views

Finding a colimit in the category of presheaves

Published on 25 Mar 2026 - 8:10

score 381 · Answer 3 · 2026-03-27 22:02:59

381

Views

What does it mean for two morphisms with different sources and targets to be isomorphic?

Published on 27 Mar 2026 - 22:02

score 217 · Answer 4 · 2026-03-25 08:12:55

217

Views

General colimits and filtered colimits in the category of sets

Published on 25 Mar 2026 - 8:12

score 681 · Answer 5 · 2026-03-26 22:15:11

681

Views

Filtered colimits in the category of sets: an equivalence relation

Published on 26 Mar 2026 - 22:15

score 370 · Answer 6 · 2026-03-25 09:48:33

370

Views

Category of Abelian Groups: Limits

Published on 25 Mar 2026 - 9:48

score 198 · Answer 7 · 2026-03-25 06:28:41

198

Views

Stuck with Category Theory notation. What is the meaning of 'Corner brackets' ｢｣?

Published on 25 Mar 2026 - 6:28

score 56 · Answer 8 · 2019-01-22 18:54:38

56

Views

Distinction between a "strictly typed function" and a "not strictly typed function"?

Published on 22 Jan 2019 - 18:54

score 109 · Answer 9 · 2026-03-25 23:09:12

109

Views

Proof verification: An arrow which is monic under a faithful functor is itself monic

Published on 25 Mar 2026 - 23:09

score 157 · Answer 10 · 2026-03-31 23:51:14

157

Views

Can you express this easy theorem in fancy categorical terms?

Published on 31 Mar 2026 - 23:51

score 106 · Answer 11 · 2026-03-24 23:29:23

106

Views

Two questions regarding the convention concerning concrete categories

Published on 24 Mar 2026 - 23:29

score 259 · Answer 12 · 2019-01-23 14:33:12

259

Views

Why is a slice category a category?

Published on 23 Jan 2019 - 14:33

score 179 · Answer 13 · 2026-03-26 19:38:01

179

Views

Multivariate Conditional Entropy as a test of correlation between random variables

Published on 26 Mar 2026 - 19:38

score 202 · Answer 14 · 2026-04-01 16:06:48

202

Views

A coend in the category of vector spaces

Published on 01 Apr 2026 - 16:06

score 60 · Answer 15 · 2026-03-26 13:00:58

60

Views

Can anyone help me understand this part of a proof involving inverse limits?

Published on 26 Mar 2026 - 13:00

List Question

Why the empty set isn't a terminal object in the $\mathcal{SET}$ as well as it is an initial object?

Finding a colimit in the category of presheaves

What does it mean for two morphisms with different sources and targets to be isomorphic?

General colimits and filtered colimits in the category of sets

Filtered colimits in the category of sets: an equivalence relation

Category of Abelian Groups: Limits

Stuck with Category Theory notation. What is the meaning of 'Corner brackets' ｢｣?

Distinction between a "strictly typed function" and a "not strictly typed function"?

Proof verification: An arrow which is monic under a faithful functor is itself monic

Can you express this easy theorem in fancy categorical terms?

Two questions regarding the convention concerning concrete categories

Why is a slice category a category?

Multivariate Conditional Entropy as a test of correlation between random variables

A coend in the category of vector spaces

Can anyone help me understand this part of a proof involving inverse limits?

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