Skip to main content
Alex Provost's user avatar
Alex Provost's user avatar
Alex Provost's user avatar
Alex Provost
  • Member for 11 years, 6 months
  • Last seen this week
14 votes
1 answer
1k views

Can we think of an adjunction as a homotopy equivalence of categories?

9 votes
1 answer
455 views

A remark on triangulated categories and localizations in Kashiwara & Schapira's *Sheaves on Manifolds*

9 votes
2 answers
1k views

Topology on the space of compatible almost complex structures in symplectic geometry

8 votes
1 answer
295 views

Does this particular axiom on a semigroup guarantee that it is a group?

7 votes
1 answer
2k views

Integral extension implies that the induced map on prime spectra is closed

5 votes
2 answers
1k views

Ideal of polynomials in $k[X_1,...X_n]$ vanishing at a point $p$ is $(X_1 - p_1, ...,X_n - p_n)$ [duplicate]

5 votes
2 answers
464 views

Sum of Cauchy sequences in an abelian topological group (first countability hypothesis)

5 votes
0 answers
137 views

On the correct definition of a *triangle* in an additive category

5 votes
1 answer
1k views

"Coordinate functions" on the structure-sheaf definition of a smooth manifold

5 votes
1 answer
231 views

Some differential geometry computation woes

4 votes
1 answer
216 views

The terminal object comes for free in the definition of a subobject classifier

4 votes
1 answer
385 views

Do homomorphisms $H \to \operatorname{Aut}(K)$ that coincide at the level of $\operatorname{Out}(K)$ induce isomorphic semidirect products?

4 votes
2 answers
1k views

Product of ideals corresponding to vanishing of points is equal to their intersection

4 votes
2 answers
762 views

The Whitney sphere immersion

4 votes
0 answers
261 views

Can this idea give rise to a proof of the 2-dimensional Borsuk-Ulam theorem?

3 votes
1 answer
675 views

Independence of coordinate charts in the definition of the order of a pole of a meromorphic 1-form on a Riemann surface

2 votes
1 answer
318 views

Confusion regarding the augmentation map of Lie algebras

2 votes
1 answer
292 views

Homomorphisms $H \to \operatorname{Aut}(K)$ that induce isomorphic semidirect products for centerless $K$

2 votes
1 answer
415 views

Confusion regarding the $\omega$-limit of a set in a flow

2 votes
1 answer
255 views

Understanding Switzer's telescope construction on a CW complex

2 votes
1 answer
163 views

Confusion regarding the use of horizontal padding of $(1,1)$-tensor indices: which is the "correct" interpretation?

2 votes
0 answers
139 views

References for the moduli space of conformal structures on a disk minus boundary points

1 vote
1 answer
89 views

Preservation of connected component in enlarged space

1 vote
1 answer
162 views

On the definition of the Sobolev space $W^{1,p}(I)$