Vincent's user avatar
Vincent's user avatar
Vincent's user avatar
Vincent
  • Member for 10 years, 4 months
  • Last seen this week
104 votes
Accepted

Three coins are tossed. If one of them shows a tails, what is the probability that all three coins show tails?

23 votes
Accepted

Why isn't this a well ordering of $\{A\subseteq\mathbb N\mid A\text{ is infinite}\}$?

18 votes
Accepted

Example of a representation of $U(1)$ with $n>2$

16 votes

Name and layperson's explanation for an E8 group diagram.

12 votes

What is the representation of a Lie group intuitively?

10 votes

Are all isomorphisms between the Fano plane and its dual of order two?

10 votes

All vertices have degree 3 but graph is only 4-edge-colorable?

9 votes
Accepted

Beginner's question about representation weights in Lie algebras and their relation to eigenvalues

7 votes

For which $n$ can the plane with $n$ points removed be equipped with a Lie group structure?

7 votes
Accepted

Adjoint representation of Sl(2,C)

7 votes

Does orthogonality of vectors depend on the chosen basis?

7 votes
Accepted

Misleading expected value

7 votes

Can a sum of consecutive $n$th powers ever equal a power of two?

6 votes
Accepted

$\mathbb K[s, t]/\langle s-t\rangle\simeq \mathbb K[t]$ as $\mathbb K$-algebras?

6 votes
Accepted

Is the maximum degree of a planar graph 5?

6 votes
Accepted

Probability and expected steps for two ants to meet on cube

6 votes
Accepted

Triangular numbers divisible by $3$

5 votes

$G_2$ as the group of Isometries of a Projective Space

5 votes
Accepted

Is the one-dimensional Lie algebra L=C semisimple?

5 votes
Accepted

For a connected, simply connected Lie group what does the Lie algebra tell me?

5 votes
Accepted

G2 weight and root lattce

5 votes
Accepted

Who's right regarding this proof of a property of the boundary of a union?

5 votes
Accepted

Transpose and adjoint of a linear operator

5 votes
Accepted

If $A$ is $4\times2$ and $B$ is $2\times4$, prove that $AB$ is not invertible

5 votes
Accepted

Why doesn't the definition "$p$ is called 'prime' if $p\mid ab\implies p\mid a\,\text{ or }\,p\mid b$" hold up when we square numbers?

5 votes
Accepted

Abelian subgroup of the unit quaternions

5 votes
Accepted

$\ker(β : V \otimes V → k)$ contains the subspace ${V}^{ \perp}\otimes V +V \otimes {V}^{\perp}$,

4 votes
Accepted

Solving P(TRUE) of finding counterpart pairs in 2 sets with constraints involving the Universal Genetic Code

4 votes

Permutation of array.

4 votes
Accepted

Mathematical operation to simulate logical OR with boolean values $\textsf{false} = 0,\ \textsf{true} = \mathbb{R}^*$

1
2 3 4 5
10