user avatar
user avatar
user avatar
Rasmus
  • Member for 11 years, 11 months
  • Last seen more than a week ago
73 votes
Accepted

Does $G\cong G/H$ imply that $H$ is trivial?

49 votes
Accepted

Prove that $\lfloor0.999\dots\rfloor= ?$ $0$ or $1$?

42 votes

When to learn category theory?

34 votes
Accepted

Is a Fourier transform a change of basis, or is it a linear transformation?

27 votes

Tensor product and Kronecker Product

26 votes
Accepted

Function theory: codomain and image, difference between them

21 votes
Accepted

Is it possible to 'split' coin flipping 3 ways?

19 votes

Are any two open connected subsets of $\Bbb{R}^n$ homeomorphic?

15 votes

Vivid examples of vector spaces?

14 votes

Can spectrum "specify" an operator?

13 votes
Accepted

Is $O$ in $f \in O(g)$ a total partial order on the set of functions?

13 votes
Accepted

Flat not projective, projective not free

13 votes
Accepted

What are the sub-sets of a null set?

13 votes
Accepted

Connections between K-Theory and PDEs?

13 votes
Accepted

Weierstrass M-Test

12 votes

Evaluating the integral $\int_0^\infty \frac{\sin x} x \,\mathrm dx = \frac \pi 2$?

11 votes
Accepted

Pseudoinverse matrix and SVD

11 votes

False beliefs in mathematics (conceptual errors made despite, or because of, mathematical education)

10 votes
Accepted

How can I prove $\underbrace{\int \ldots \int}_{n} |x| dx = \frac{x^n |x|}{n+1}+C$?

10 votes
Accepted

sigma algebra generated by random variable

10 votes

Why is the 3D case so rich?

10 votes
Accepted

Adding powers of $i$

10 votes

Probability of either dice showing a specific number

10 votes
Accepted

For integers $a$ and $b$, $ab=\text{lcm}(a,b)\cdot\text{hcf}(a,b)$

10 votes

How to prove if function is increasing

9 votes
Accepted

Strong convergence does not imply operator norm convergence

9 votes
Accepted

Function $f(x)$ similar to exp(x) where $-f(x)$ is approximately $f(-x)$

9 votes

Is Minkowski space not a metric space?

9 votes
Accepted

Operator whose spectrum is given compact set

9 votes
Accepted

Is there some universal sense of -ification (eg, groupification) in category theory

1
2 3 4 5
9