User Carla_ - Mathematics Stack Exchange

12 votes

2 answers

2k views

(Why) Does Algebraic Topology only deal with topological spaces up to homotopy?

asked May 5, 2023 at 11:30

9 votes

1 answer

187 views

Is the duality concept in linear programming related to category theory?

asked May 6, 2023 at 16:46

6 votes

0 answers

136 views

Are there "differentiable manifolds" that don't admit a $C^1$-structure

asked Aug 29, 2023 at 10:15

5 votes

1 answer

126 views

Is there a classification of symmetric monoidal closed structures on $\mathbf{Ab}$?

asked Jun 12, 2023 at 20:48

4 votes

1 answer

68 views

Does $\omega$-consistency depend on the encoding?

asked Sep 21, 2023 at 21:54

4 votes

0 answers

67 views

Full subcategories of $\textbf{Grp}$ that are monoidal closed

asked Aug 23, 2023 at 11:10

4 votes

2 answers

100 views

Showing if the group $\frac {F[a,b]}{(a^2 = b^2)}$ is torsion free

asked Apr 3, 2023 at 14:27

3 votes

1 answer

87 views

Whats the relation between preorders and (small) thin categories?

asked Apr 3, 2023 at 22:58

2 votes

1 answer

106 views

MIT old Calculus Exam Question about estimating $\sin(\pi+\frac 1 {100})$ to two decimal places

asked Apr 4, 2023 at 19:56

2 votes

0 answers

35 views

Why are PROPS and their morphisms strict?

asked Apr 14, 2023 at 19:19

2 votes

1 answer

180 views

Can $\operatorname{Spec}(R)$ be not homeomorphic to $\operatorname{Spec}(S)$ but be isomorphic as a poset?

asked Apr 22, 2023 at 16:43

1 vote

1 answer

162 views

Why are natural transformations the morphisms between functors?

asked Mar 26, 2023 at 10:40

1 vote

0 answers

59 views

(Why) do most irreducible quartic polynomials with four real roots over $\mathbb Q$ have galois group $A_4$?

asked Jul 25, 2023 at 16:36

0 votes

1 answer

240 views

What is the importance of the spectral theorem? (not the importance of diagonalization)

asked Feb 21, 2023 at 10:48

0 votes

2 answers

163 views

Conceptually, what do abelian groups represent? [closed]

asked May 24, 2023 at 14:23

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15 Questions

(Why) Does Algebraic Topology only deal with topological spaces up to homotopy?

Is the duality concept in linear programming related to category theory?

Are there "differentiable manifolds" that don't admit a $C^1$-structure

Is there a classification of symmetric monoidal closed structures on $\mathbf{Ab}$?

Does $\omega$-consistency depend on the encoding?

Full subcategories of $\textbf{Grp}$ that are monoidal closed

Showing if the group $\frac {F[a,b]}{(a^2 = b^2)}$ is torsion free

Whats the relation between preorders and (small) thin categories?

MIT old Calculus Exam Question about estimating $\sin(\pi+\frac 1 {100})$ to two decimal places

Why are PROPS and their morphisms strict?

Can $\operatorname{Spec}(R)$ be not homeomorphic to $\operatorname{Spec}(S)$ but be isomorphic as a poset?

Why are natural transformations the morphisms between functors?

(Why) do most irreducible quartic polynomials with four real roots over $\mathbb Q$ have galois group $A_4$?

What is the importance of the spectral theorem? (not the importance of diagonalization)

Conceptually, what do abelian groups represent? [closed]