André Henriques's user avatar
André Henriques's user avatar
André Henriques's user avatar
André Henriques
  • Member for 13 years, 11 months
  • Last seen this week
77 votes
11 answers
13k views

Applications of mathematics

64 votes
6 answers
9k views

Are dagger categories truly evil?

59 votes
9 answers
9k views

What universities have laid off tenured math faculty for financial reasons?

53 votes
10 answers
7k views

Changes forced by the pandemic

51 votes
2 answers
2k views

$H^4(BG,\mathbb Z)$ torsion free for $G$ a connected Lie group

46 votes
6 answers
4k views

Why the "W" in CGWH (compactly generated weakly Hausdorff spaces)?

45 votes
2 answers
3k views

$H^4$ of the Monster

41 votes
3 answers
3k views

Why is there such a close resemblance between the unitary representation theory of the Virasoro algebra and that of the Temperley-Lieb algebra?

36 votes
0 answers
1k views

Functor that maps to both $KO^n$ and $KO^{-n}$

35 votes
2 answers
9k views

tr(ab) = tr(ba)?

35 votes
3 answers
2k views

Defining $SU(n)$ in HoTT

33 votes
1 answer
1k views

Is $L^2(\mathbb R)$ homeomorphic to $L^1(\mathbb R)$?

33 votes
1 answer
2k views

For which maps $S^1\to S^1$ is the winding number defined?

31 votes
3 answers
3k views

What's the state of affairs concerning the identification between quantum group reps at root of unity, and positive energy affine Lie algebra reps?

31 votes
3 answers
2k views

What does it mean for a category to admit direct integrals?

30 votes
2 answers
2k views

quantum groups... not via presentations

30 votes
5 answers
6k views

Verlinde's formula

30 votes
1 answer
2k views

Tomita-Takesaki versus Frobenius: where is the similarity?

28 votes
5 answers
3k views

Continuous + holomorphic on a dense open => holomorphic?

28 votes
4 answers
3k views

Conceptual proof of classification of surfaces?

25 votes
2 answers
936 views

Is super-vector spaces a "universal central extension" of vector spaces?

24 votes
2 answers
817 views

Can one deform an immersion of a 3-manifold in $\mathbb R^4$ to an embedding in $\mathbb R^6$?

23 votes
3 answers
1k views

square root of diffeomorphism of R: does it always exist?

22 votes
2 answers
3k views

Does it make sense to talk about smooth bundles of Hilbert spaces?

21 votes
0 answers
463 views

What are the indecomposable $U_q\mathfrak{sl}(2)$-modules?

20 votes
2 answers
2k views

elliptic curves and group cohomology

20 votes
3 answers
1k views

central extensions of Diff(S^1) and of the semigroup of annuli

20 votes
1 answer
856 views

Odd primary dual Steenrod algebra

19 votes
3 answers
1k views

Are Chern classes well defined up to contractible choice?

19 votes
7 answers
3k views

Universal cover of SL2(R) admits no central extensions?

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