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Daniel Teixeira's user avatar
Daniel Teixeira's user avatar
Daniel Teixeira's user avatar
Daniel Teixeira
  • Member for 6 years, 7 months
  • Last seen more than a week ago
6 votes

How to prove $f(x)=a$ is a subspace

5 votes

Pullback in the category of graphs

4 votes

The set of all vector spaces

4 votes

Meaning of curl defined as in differential geometry

4 votes

Universal property for tensor product in an arbitrary category

4 votes
Accepted

Flaw in a proof of uniqueness of products in a category?

4 votes
Accepted

Monoidal category: Inequivalent associators

3 votes

Monomorphisms of monoids

3 votes

What is the union of two varieties

3 votes

$x-y> 1$. How is this relation neither symmetric nor anti symmetric?

3 votes

Using a smooth function to replace a coordinate on a manifold

2 votes
Accepted

Is the smash-hom adjunction a homeomorphism?

2 votes
Accepted

Define the fact that $Hom_{C}(X,Y)$ is bijective for category $C.$

2 votes

Concretely, what is the horn $\Lambda_k^n$?

2 votes
Accepted

Tuples of functions (with different domains and codomains)

2 votes
Accepted

Is Fock space a symmetric/exterior algebra?

2 votes

Can the starting point of an infinite series be a non-integer?

2 votes

Is X a cover of itself?

2 votes

Rationalize this

2 votes

Tensor and Wedge

2 votes
Accepted

Let $U, V \in M_{n\times n}$ be orthogonal matrices. Explain why $UV$ is an orthogonal matrix

1 vote
Accepted

Dual of a statement involving adjoint functors

1 vote
Accepted

A question on forms

1 vote
Accepted

Transpose of a diagram under an adjunction

1 vote

Visualizing $|\mathcal{B}\mathbb{Z}| \simeq S^1$.

1 vote
Accepted

The Eckmann-Hilton argument gives us an isomorphism between $Mon(Mon(C))$ and $CoMon(C)$ or just an equivalence?

1 vote

Why are the coefficients always equal?

1 vote

Why are the fibers of principal G-bundles homeomorphic to G?

1 vote

Universal Cover of $SO^+(2,4)$

1 vote
Accepted

Well Defined Maps