Skip to main content
Olivier Bégassat's user avatar
Olivier Bégassat's user avatar
Olivier Bégassat's user avatar
Olivier Bégassat
  • Member for 13 years
  • Last seen this week
  • France
45 votes
3 answers
10k views

Use of Reduced Homology

45 votes
0 answers
1k views

On the equivalence relation $(a,b) \sim (c,d)\iff a+b=c+d$

26 votes
1 answer
2k views

Question about Milnor's talk at the Abel Prize

24 votes
5 answers
4k views

Homology Whitehead theorem for non simply connected spaces

22 votes
1 answer
2k views

Ties between Lie algebras and ring theory

22 votes
1 answer
694 views

Shrinking Group Actions

19 votes
5 answers
2k views

Examples of Monads and their Algebras

19 votes
4 answers
834 views

For which $L^p$ is $\pi=3.2$?

17 votes
1 answer
7k views

Conjugacy classes in $A_n$.

15 votes
3 answers
4k views

How do you pronounce the symbol $'$ in $f'$?

15 votes
0 answers
2k views

Fundamental group of a compact manifold

15 votes
2 answers
2k views

Inscrutable proof in Humphrey's book on Lie algebras and representations

14 votes
0 answers
179 views

Understanding $(x)=(y)$ in rings that aren't domains

13 votes
1 answer
248 views

Does "zero dimensional domains are fields" require the Boolean Prime Ideal theorem?

12 votes
1 answer
2k views

Importance of the Artin-Wedderburn theorem

10 votes
3 answers
514 views

Reducibility of $P(X^2)$

9 votes
0 answers
344 views

Why is well-pointedness necessary for $X\hookrightarrow M_f$ to be a pointed cofibration?

9 votes
1 answer
188 views

Is this (classical?) exercice missing a hypothesis?

9 votes
1 answer
239 views

Strength of "Every finite dimensional subspace of a vector space has a complement"

9 votes
3 answers
482 views

Help me get hyped about lattices

8 votes
2 answers
1k views

Several questions around the exponential law

8 votes
2 answers
3k views

Original proof of Uniform Boundedness Principle (Banach Steinhaus) and related questions

7 votes
1 answer
618 views

Paracompact and Compactly Generated spaces

6 votes
1 answer
2k views

Applications of the fundamental theorems of affine and projective geometry.

6 votes
1 answer
503 views

Topology knowledge for CW complexes $\oplus$ Reference request

6 votes
1 answer
736 views

Importance of well-pointedness (in particular for the pointed mapping cylinder construction)

6 votes
2 answers
699 views

Loop spaces have the homotopy type of a topological groups

6 votes
1 answer
1k views

Applications of the Mecke formula

6 votes
0 answers
170 views

$s$-finite vs. $\sigma$-finite measures

6 votes
0 answers
80 views

Injectivity preservation for polynomial maps under field extension