Stack Exchange

Joshua Mundinger

https://joshuamundinger.github.io

I am a postdoc at University of Wisconsin-Madison. My interests lie in representation theory, algebraic geometry, topology, and combinatorics.

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Top Questions
Top Answers
17
Is there a countable discrete infinite group $G$ over which the group algebra $\mathbb{C} G$ is semisimple?
mathoverflow.net

14
What is the difference between $O(2^{n})$ and $2^{O(n)}$?
math.stackexchange.com

11
Where have I used commutative (coproduct in $\mathbf{Ab}$ vs. $\mathbf{Grp}$)
math.stackexchange.com

10
Why is $\mathbb{Z}$ not an inital object of Gr or AB?
math.stackexchange.com

10
A nontrivial principal bundle which satisfies Leray-Hirsch theorem
mathoverflow.net

9
Isomorphism of centers of isomorphic groups
math.stackexchange.com

9
Proof that if $3^n - 2^n$ is prime then $n$ is prime
math.stackexchange.com

9
Can I use Seifert-van Kampen theorem infinite times
math.stackexchange.com

7
A specific coset decomposition of $\mathrm{GL}_n(\mathbb{C})$
mathoverflow.net

6
Integrating 2-form and change of variables question
math.stackexchange.com

6
Relation between two homomorphisms from $SO(3)$ to the Möbius group $PGL(2,\mathbb{C})$
mathoverflow.net

6
Peter–Weyl theory for vector fields
mathoverflow.net

6
$n$-th root of meromorphic functions of several complex variables
mathoverflow.net

5
Exponential lower bound for Fibonacci numbers
math.stackexchange.com

5
Determinant of a matrix over a field of characteristic 2
math.stackexchange.com

5
Let $A$ be the group of anti-automorphisms, $B=A\cup \operatorname{Aut}(G)$, prove $B\cong A\times \mathbb{Z}/2\mathbb{Z}$
math.stackexchange.com

5
Why are homology groups not invariant under isomorphism classes?
math.stackexchange.com

5
What does it mean for "The cycles to be a direct summand in the chains"?
math.stackexchange.com

5
Is a linearly independent subset of a vector space still independent over a bigger field?
math.stackexchange.com

5
Slicker computation of the Lie algebra of the symplectic group (and computing differentials of matrix equations of polynomials)
mathoverflow.net

5
Polytope with most faces
mathoverflow.net

5
Representations of the symmetric group with image in a given subgroup of $\operatorname{GL}_m$
mathoverflow.net