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ViHdzP
  • Member for 4 years, 7 months
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20 votes
2 answers
291 views

Why is $!n\pmod{n+k}$ a multiple of $k+1$ so often?

13 votes
2 answers
618 views

What are the main ideas needed to prove that only $92$ Johnson solids exist?

6 votes
3 answers
852 views

Are there such things as infinite-dimensional regular polytopes?

4 votes
3 answers
1k views

Real Schur decomposition of orthogonal matrix

4 votes
2 answers
267 views

Characterization of interior points of a convex polytope

4 votes
2 answers
271 views

What is the complete classification of the uniform tesselations?

4 votes
1 answer
179 views

Inductive hypothesis in surreal multiplication proof

3 votes
2 answers
197 views

Descartes-like formula in 4D

3 votes
1 answer
412 views

When can a regular simplex be inscribed in a regular hypercube?

3 votes
0 answers
84 views

For which regular $n$-gons are there two sides/diagonals with a rational ratio other than $1$?

3 votes
1 answer
141 views

Can a Riemann integral be defined over arbitrary compact subsets of $\mathbb R$?

3 votes
1 answer
57 views

Two primitive roots add to a third

3 votes
1 answer
65 views

Transitivity of rational orthogonal matrices

3 votes
1 answer
148 views

Algebraic degree of $\cos\left(\frac{p\pi}{q}\right)$

2 votes
2 answers
53 views

Equal angles are congruent, in an arbitrary symmetric bilinear space

2 votes
3 answers
163 views

A proof for bivector decomposition

2 votes
1 answer
106 views

Dimension of function space $X \to \mathbb F$

2 votes
1 answer
212 views

What is the complete list of radially equilateral polyhedra?

2 votes
1 answer
63 views

Algorithm to find the $n$ with $d(n)\leq\sqrt[k]{n}$

2 votes
1 answer
151 views

Continuous functions $\mathbb R_\ell\to\mathbb R_\ell$

2 votes
2 answers
288 views

Proof of Straszewicz's theorem

1 vote
1 answer
76 views

Possible polygons in uniform polyhedra

1 vote
1 answer
638 views

What are the fixed points of $f^n$ for $f(z)=\frac{z^2-1}{2z}$?

1 vote
1 answer
162 views

Congruences of consecutive Fibonacci numbers

1 vote
1 answer
59 views

Flags of convex polytope are oppositely oriented

1 vote
0 answers
27 views

Density of convex set at a point

1 vote
0 answers
22 views

Markov chains exist

1 vote
0 answers
64 views

Linear independence of tensor products $\{v_i \otimes w_j\}$ without choice

0 votes
1 answer
110 views

Cofinality of functions $\mathbb N\to\mathbb N$ under eventual domination