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justt's user avatar
justt
  • Member for 11 years, 2 months
  • Last seen more than a month ago
13 votes

Let $K$ be a subfield of $\mathbb{C}$ not contained in $\mathbb{R}$. Show that $K$ is dense in $\mathbb{C}$.

8 votes
Accepted

Little o notation in Taylor's formula : o(1)

8 votes

Is it possible to prove $\forall x, f'(x)=g'(x) \implies g(x)=f(x)+C$?

6 votes
Accepted

Flajolet & Sedgewick: Asymptotic behavior of "super-necklaces"

6 votes
Accepted

Is there a mistake in solving this limit?

6 votes
Accepted

Do $L^2$ convergence and continuity imply pointwise convergence?

6 votes
Accepted

Which map of the Earth corresponds to the usual parametrization of the sphere?

5 votes
Accepted

How does the least squares solution change if we add redundant rows?

5 votes

What is the Lebesgue measure of Luzin's non-Borel set of reals?

4 votes
Accepted

Simulate a biased coin with a fair coin using a fixed number of tosses

4 votes
Accepted

A statement about finite Markov chains

4 votes
Accepted

A redundant(?) function in the definition of a random variable

4 votes
Accepted

Proof of a theorem on measurable functions

4 votes
Accepted

There must exist a random variable with certain given law?

4 votes
Accepted

When $X$ and $Y$ are identically distributed they have the same mean

4 votes
Accepted

How can I compute the distribution function of $\Bbb{E}(Z|N)$?

4 votes

What is $1^1+3^3+5^5+7^7+…+n^n$?

4 votes
Accepted

A basic question about concave function.

3 votes
Accepted

Intuition behind writing the Laplacian operator in different ways: $\nabla^2 u$ versus $\nabla \cdot \nabla u$

3 votes
Accepted

Show that $\int x \mu(dx)=0$ when $\mu$ is the "limit" of a sequence of measures.

3 votes
Accepted

Poisson Distribution Question and Memoryless property

3 votes

Let $f:A\rightarrow B$ and $C\subset B,D\subset B$. Prove that $f^{-1}(C\backslash D)=f^{-1}(C)\backslash f^{-1}(D)$

3 votes

Probability of $x<y^2$ where $x$ and $y$ are uniformly distributed.

3 votes

Linear Algebra: Orthogonal Theorem presented in two different ways. Why and how is it possible?

3 votes

Every element of $U + V + W$ can be expressed uniquely in the form $u + v + w$

3 votes

Describe the set whose points satisfy the following relation: $|z^2 - 1| < 1$

3 votes
Accepted

Is there a method to calculate the eigenvalues for this a n x n symmetrical matrix

3 votes

A question about martingale and Brownian motion

3 votes
Accepted

Formula for generating a series of numbers where probability of a number is inverse to its value

3 votes
Accepted

What theorem tells us that a function has a power series expansion around a point?

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