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earned this badge 76 times.
Can Rep(G) tell us whether G is discrete?
Awarded Nov 5, 2023 at 22:46
Smooth Urysohn's lemma on Fréchet spaces
Awarded Nov 2, 2023 at 10:50
Unitary group of a von Neumann algebra: is it a retract of $U(H)$?
Awarded Sep 21, 2023 at 6:08
Interpolating between disks in the plane
Awarded Feb 6, 2023 at 19:18
Are Chern classes well defined up to contractible choice?
Awarded Oct 12, 2022 at 2:57
Estimating the growth of the Taylor coefficients given the growth of the function at the boundary
Awarded Nov 25, 2021 at 13:27
the (non-existent) group of conformal transformations
Awarded Aug 8, 2021 at 1:56
Changes forced by the pandemic
Awarded May 28, 2021 at 10:20
Complex manifold with boundary
Awarded Oct 22, 2020 at 12:25
Riemann mapping theorem and smoothness on the boundary
Awarded May 13, 2020 at 16:26
Conceptual proof of classification of surfaces?
Awarded Feb 20, 2020 at 19:20
Classifying space for Thompson's group F?
Awarded Jan 22, 2020 at 22:40
Actions of locally compact groups on the hyperfinite $II_1$ factor
Awarded Mar 11, 2019 at 21:05
ordered exponential of unbounded operators
Awarded Jan 30, 2019 at 15:35
Linear independence of genus-one correlation functions
Awarded Jan 21, 2019 at 19:45
What does it mean for a category to admit direct integrals?
Awarded Oct 20, 2018 at 23:05
Unbiased Hopf algebras
Awarded Jul 25, 2018 at 6:20
Odd primary dual Steenrod algebra
Awarded May 4, 2018 at 9:23
Spaces locally modelled on $L^2(\mathbb R)$
Awarded Feb 20, 2018 at 8:50
Trace-class operator satisfies $\sum |\lambda_n|<\infty$?
Awarded Feb 19, 2018 at 10:27
Defining $SU(n)$ in HoTT
Awarded Jan 2, 2018 at 2:45
Are finite spaces a model for finite CW-complexes?
Awarded Dec 28, 2017 at 10:13
Square root of the determinant line
Awarded Oct 10, 2017 at 18:18
Contraction semigroup on Hilbert space
Awarded Jul 18, 2017 at 7:36
Is $L^2(\mathbb R)$ homeomorphic to $L^1(\mathbb R)$?
Awarded May 8, 2017 at 16:27
K-theory space of a C*-algebra
Awarded Apr 3, 2017 at 12:03
Explicit cocycle for the central extension of the algebraic loop group G(C((t)))
Awarded Feb 18, 2017 at 12:46
Which category of sheaves on a manifold remembers the manifold?
Awarded Dec 15, 2016 at 16:11
On spatial tensor products of von Neumann algebras
Awarded Jun 28, 2016 at 15:43
What are the indecomposable $U_q\mathfrak{sl}(2)$-modules?
Awarded May 29, 2016 at 1:35
Is there a formula for the Frobenius-Schur indicator of a rep of a Lie group?
Awarded Jan 9, 2016 at 11:33
elliptic curves and group cohomology
Awarded Dec 19, 2015 at 13:57
Can one deform an immersion of a 3-manifold in $\mathbb R^4$ to an embedding in $\mathbb R^6$?
Awarded Dec 14, 2015 at 18:38
Are dagger categories truly evil?
Awarded Oct 5, 2015 at 13:31
Are all separable algebras Frobenius algebras?
Awarded Aug 28, 2015 at 0:21
How do I check that this is a Frobenius algebra?
Awarded Jan 27, 2015 at 1:14
on the center of a Lie group
Awarded Oct 28, 2014 at 0:13
differentiating positive energy LG reps
Awarded Sep 18, 2014 at 8:15
$H^4(BG,\mathbb Z)$ torsion free for $G$ a connected Lie group
Awarded Sep 5, 2014 at 19:15
What's the state of affairs concerning the identification between quantum group reps at root of unity, and positive energy affine Lie algebra reps?
Awarded Aug 9, 2014 at 6:45
Topological transversality
Awarded Jul 16, 2014 at 4:57
Connes' idea to use the hyperfinite $III_1$ factor for the archimedian place of Spec(Z)?
Awarded May 11, 2014 at 10:49
For which maps $S^1\to S^1$ is the winding number defined?
Awarded Apr 12, 2014 at 10:17
Is the representation category of quantum groups at root of unity visibly unitary?
Awarded Feb 4, 2014 at 8:15
compact-open topology on $B(H)$
Awarded Jan 13, 2014 at 3:39
Verlinde's formula
Awarded Dec 9, 2013 at 9:21
Monoidal structures on von Neumann algebras
Awarded Jun 8, 2013 at 13:35
Čech cohomology of compact spaces via closed covers?
Awarded Apr 19, 2013 at 4:35
Are centrally extended p-adic groups defined over F_1?
Awarded Mar 30, 2013 at 23:35
Two fancy ways of defining differential forms: How does one show that they are equivalent?
Awarded Aug 22, 2012 at 17:50
Continuous + holomorphic on a dense open => holomorphic?
Awarded Jul 12, 2012 at 11:35
Can the minimal index of a subfactor take all values in {4cos^2(pi/n);n=3,4,5,...} u [4,infinity]?
Awarded Jul 10, 2012 at 8:50
Endomorphism of type III factor: can it satisfy $\phi\circ\phi = \phi\oplus\phi$?
Awarded Jul 5, 2012 at 10:05
Why the "W" in CGWH (compactly generated weakly Hausdorff spaces)?
Awarded Dec 9, 2011 at 0:05
Complex structure on $L^2(\mathbb R)$ generalizing the Hilbert transform
Awarded Oct 24, 2011 at 16:05
Applications of mathematics
Awarded Sep 26, 2011 at 11:20
square root of diffeomorphism of R: does it always exist?
Awarded Sep 11, 2011 at 21:20
central extensions of Diff(S^1) and of the semigroup of annuli
Awarded Aug 13, 2011 at 10:05
Functor that maps to both $KO^n$ and $KO^{-n}$
Awarded Jul 18, 2011 at 10:20
What universities have laid off tenured math faculty for financial reasons?
Awarded Jul 1, 2011 at 5:35
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