Joshua Mundinger's user avatar
Joshua Mundinger's user avatar
Joshua Mundinger's user avatar
Joshua Mundinger
  • Member for 10 years, 5 months
  • Last seen more than a week ago
15 votes
Accepted

What is the difference between $O(2^{n})$ and $2^{O(n)}$?

11 votes
Accepted

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

10 votes

Isomorphism of centers of isomorphic groups

10 votes
Accepted

Why is $\mathbb{Z}$ not an inital object of Gr or AB?

9 votes

Can I use Seifert-van Kampen theorem infinite times

9 votes
Accepted

Proof that if $3^n - 2^n$ is prime then $n$ is prime

6 votes
Accepted

Integrating 2-form and change of variables question

5 votes
Accepted

Tensor product of irreducible representations of semisimple Lie algebras

5 votes

Is a linearly independent subset of a vector space still independent over a bigger field?

5 votes
Accepted

Exponential lower bound for Fibonacci numbers

5 votes

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

5 votes
Accepted

Determinant of a matrix over a field of characteristic 2

4 votes
Accepted

Matroid Theory with Graph Theory, Need an Introduction Book

4 votes

Ring structure in the Serre spectral sequence

4 votes

Determine every group with order 22

4 votes
Accepted

Homotopy idempotent maps over a finite product of spheres

4 votes
Accepted

How to compute $H_1(S^1, S^0) $

4 votes

Methods to prove that two groups are isomorphic

4 votes
Accepted

If a function $f(x)$ satisfies $f(f(x))=xf(x)+a$, how many roots does it have?

4 votes
Accepted

Modified homotopy and relation with intersection theory.

4 votes

Generators of the image of a homomorphism $G \rightarrow \operatorname{GL}_{n}(\mathbb{C})$

4 votes

Why are homology groups not invariant under isomorphism classes?

4 votes
Accepted

Question about the proof of Second Isomorphism Theorem

4 votes
Accepted

Isomorphism of Vector Bundles

4 votes
Accepted

What does it mean for "The cycles to be a direct summand in the chains"?

4 votes

Which semisimple elements of a semisimple Lie algebra belong to some $\mathfrak{sl}_2$ triple?

3 votes
Accepted

Can $\operatorname{Spin}(n)$ be defined through the short exact sequence?

3 votes

Every matrix of the centralizer of the centralizer of a matrix is a polynomial in that matrix

3 votes

Simple minded details about why a particular map is étale

3 votes
Accepted

Radical of $(xy,yz,xz)$ is $(xy,yz,xz)$ in the ring $k[x,y,z]$

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