Question

Is every subgroup of a profinite group contained in a maximal subgroup?

score 60 · Answer 1 · 2026-03-25 20:52:47

60

Views

Is every subgroup of a profinite group contained in a maximal subgroup?

Published on 25 Mar 2026 - 20:52

score 41 · Answer 2 · 2026-05-06 08:00:25

41

Views

Minor notations clarifications needed for a proof showing the categorical limits in the category of Topological space.

Published on 06 May 2026 - 8:00

score 63 · Answer 3 · 2026-04-11 20:09:59

63

Views

Difference between coproduct of monoids and coproduct/product of free monoids.

Published on 11 Apr 2026 - 20:09

score 170 · Answer 4 · 2026-04-12 00:49:11

170

Views

Are point-free topologies a "proper" generalization of pointwise topologies?

Published on 12 Apr 2026 - 0:49

score 52 · Answer 5 · 2026-04-11 19:27:32

52

Views

Building Ab from Set just as we build Spectra from Top

Published on 11 Apr 2026 - 19:27

score 146 · Answer 6 · 2026-03-25 20:52:47

146

Views

Is every closed subgroup of a profinite group contained in a maximal subgroup?

Published on 25 Mar 2026 - 20:52

score 80 · Answer 7 · 2026-04-10 08:09:22

80

Views

Internally Inhabited Object Which Is Not Externally Inhabited

Published on 10 Apr 2026 - 8:09

score 50 · Answer 8 · 2026-04-29 08:41:39

50

Views

Kernel of natural homomorphism into Direct limit

Published on 29 Apr 2026 - 8:41

score 235 · Answer 9 · 2026-05-15 08:09:45

235

Views

Is there notion of a relation in category theory?

Published on 15 May 2026 - 8:09

score 112 · Answer 10 · 2026-05-11 01:41:56

112

Views

Coideal Definition

Published on 11 May 2026 - 1:41

score 42 · Answer 11 · 2026-04-11 14:05:29

42

Views

Clearing up confusions with limits and colimits of functors

Published on 11 Apr 2026 - 14:05

score 71 · Answer 12 · 2026-04-14 04:11:54

71

Views

Natural transformation in category theory

Published on 14 Apr 2026 - 4:11

score 58 · Answer 13 · 2026-04-17 15:42:13

58

Views

Is every category the dual of some category?

Published on 17 Apr 2026 - 15:42

score 47 · Answer 14 · 2026-04-11 18:07:54

47

Views

Is there an extension of the covariant powerset functor to Rel that agrees with its definition on Set?

Published on 11 Apr 2026 - 18:07

score 38 · Answer 15 · 2026-04-13 08:51:00

38

Views

How to prove $\text{Mor}_Z(T,-)$ preserves product?

Published on 13 Apr 2026 - 8:51

List Question

Is every subgroup of a profinite group contained in a maximal subgroup?

Minor notations clarifications needed for a proof showing the categorical limits in the category of Topological space.

Difference between coproduct of monoids and coproduct/product of free monoids.

Are point-free topologies a "proper" generalization of pointwise topologies?

Building Ab from Set just as we build Spectra from Top

Is every closed subgroup of a profinite group contained in a maximal subgroup?

Internally Inhabited Object Which Is Not Externally Inhabited

Kernel of natural homomorphism into Direct limit

Is there notion of a relation in category theory?

Coideal Definition

Clearing up confusions with limits and colimits of functors

Natural transformation in category theory

Is every category the dual of some category?

Is there an extension of the covariant powerset functor to Rel that agrees with its definition on Set?

How to prove $\text{Mor}_Z(T,-)$ preserves product?

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