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  • Member for 6 years, 9 months
  • Last seen more than 4 years ago
16 votes
Accepted

Geometric interpretation of Hölder's inequality

12 votes
Accepted

Does a family of linearly independent injective maps have a vector with linearly independent images?

10 votes

Generalize exterior algebra: vectors are nilcube instead of nilsquare

10 votes

Prove that $\Bbb{E}(|X-Y|) \le \Bbb{E}(|X+Y|)$ for i.i.d $X$ and $Y$

10 votes

Is the rectangular function a convolution of $L^1$ functions?

9 votes

Isometry in compact metric spaces

9 votes
Accepted

Square root of positive definite nonsymmetric matrix

9 votes
Accepted

If two set systems' elements all have even intersection, then the product of their cardinality is $\le 2^n$

8 votes
Accepted

Fibonacci numbers mod $p$

7 votes

Reparameterization Trick for Gaussian Distribution

7 votes

Showing that $ |\cos x|+|\cos 2x|+\cdots+|\cos 2^nx|\geq \dfrac{n}{2\sqrt{2}}$

7 votes
Accepted

$f+f'+f''\geq0$ implies that $f$ has a lower bound

7 votes

Entire function $f(z)$ grows like $\exp(x^\pi)$ as $x\to+\infty$

6 votes

Conformal mapping from square to rectangle preserving corners

6 votes
Accepted

a periodic sequence

6 votes

A question about Existence of a Continuous function.

6 votes
Accepted

How many nodes in the smallest $k$-dense graph?

6 votes
Accepted

Not-too-non-compact metric spaces

6 votes
Accepted

A sequence with no converging subsequence that clusters everywhere

6 votes
Accepted

Can a function $f:\mathbb{R} \rightarrow \mathbb{R}$ be "infinitely steep" on a set with non-zero Lebesgue outer measure?

6 votes

Riccati Comparison Principle

6 votes
Accepted

Analytic functions whose all derivatives keep $\mathbb{Z}$ invariant

6 votes
Accepted

Super hard complex numbers problem: there do not exist $n>1$ complex numbers $z_1, z_2, \ldots, z_n$, no two equal, such that for all $1 \le k \le n$

6 votes

$A,B$ are $n×n$ matrices such that $A^2B^2=0$.

6 votes

Prove the following beta integral identity

6 votes

A guess related to Lebesgue differentiation theorem

6 votes
Accepted

Trace permutation of product of symmetric matrices

6 votes
Accepted

Pushforwards of Radon Measures under Mappings

6 votes
Accepted

$\forall f$ bounded Borel functions $\exists \{f_n\}$ continuous s.t $\forall \mu$ regular Borel measures $\int f_n d\mu \to \int f d\mu$

5 votes
Accepted

Exercise 0.8 in Rotman's An Introduction to Algebraic Topology

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