Mustafa Said's user avatar
Mustafa Said's user avatar
Mustafa Said's user avatar
Mustafa Said
  • Member for 10 years, 8 months
  • Last seen this week
  • Los Angeles, CA, United States
77 votes

Are there any series whose convergence is unknown?

31 votes

Relationship between inner product and norm

27 votes

What was the book that opened your mind to the beauty of mathematics?

13 votes

Show 1/x is Lipschitz continuous

9 votes
Accepted

How does this series diverge by limit comparison test?

9 votes

Is the determinant differentiable?

7 votes

What made you choose your research field?

7 votes
Accepted

Question about entire function

7 votes

pole at infinity iff f is a polynomial

4 votes

Find $\sup$ and $\inf$ of $(\frac{1}{n})$

4 votes
Accepted

Show that $\sum a_n$ diverges if $\sum \log (\tfrac{1}{1-a_n})$ diverges

4 votes

values of $t \in\mathbb R$ the matrix is not invertible

4 votes

A list of Rudin-style textbooks

4 votes
Accepted

Test for series Convergence:$\sum^{\infty}_{n=2}{\frac{1}{\sqrt n}\ln\left(\frac{n+1}{n-1}\right)}$

4 votes

How would I show that a set is not dense?

3 votes

$\sqrt{2\sqrt{2\sqrt{2\cdots}}}=2$

3 votes

Prove that for all $x>0$, $1+2\ln x\leq x^2$

3 votes
Accepted

Weighted Average Fixed Point Theorem

3 votes

Why does the integral of 1/x from negative infinity to infinity diverge?

3 votes
Accepted

Find $\int_\gamma \frac{dz}{z^2}$ wihtout explicit calculations

3 votes

Real Analysis: Compact Sets

3 votes
Accepted

questions about $L^p$ space with $0<p\leq 1$ parallel to the case $1<p$

3 votes
Accepted

Is there an analytic function (on the open unit disk) satisfying $\forall k \in \mathbb{Z}^+\left[f(\frac1{2k})=f(\frac1{2k+1})=\frac1{2k}\right]$?

3 votes
Accepted

Show that $V$ is a vector space

3 votes
Accepted

measure theory, $\delta$-$\epsilon$

3 votes
Accepted

Let $a_{n}$ be a sequence which converges to $c$. Then $c$ is a limit point of $a_{n}$ and it is its unique limit point.

2 votes
Accepted

Be $\Omega \subset \mathbb{C}$ an open and connected set. If $f \in A\mathbb{(\Omega)}$ and $f \neq 0$ show that the set of all zeros is numerable

2 votes
Accepted

If the sequence $\{y_k\}$ is bounded and $\sum |x_k|$ converges, then $\sum x_k y_k$ converges.

2 votes

Give 3 different examples of semi-metric spaces which are NOT metric spaces.

2 votes

Method of Proof (Computer Science)

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