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Felice Iandoli's user avatar
Felice Iandoli's user avatar
Felice Iandoli's user avatar
Felice Iandoli
  • Member for 10 years, 11 months
  • Last seen more than 3 years ago
7 votes
Accepted

Derivative of Fourier transform: $F[f]'=F[-ixf(x)]$

6 votes
Accepted

If $f$ satisfies certain conditions, then show that $\lim_{x \rightarrow \infty}{\frac{f(x)}{x}}=0$

3 votes
Accepted

Let $f\in C^1(\Bbb R)$ s.t. $f(0)=0$ and $c\in\Bbb R$. Then is $u_t=u_{xx}+f(u)+c$ a well-posed PDE?

3 votes
Accepted

Show that the Fourier Transform is differentiable

2 votes

$C_b(X)$ is non-separable for $X$ non-compact

2 votes

Question about Real analysis: Borel sets

2 votes

Show $\sum n e^{-na}$ converges for $a>0$

2 votes
Accepted

Exercise 1.12 in Tao's nonlinear dispersive equation

1 vote

Inequality about the Fourier transform: $\Vert u \Vert_{L^k} \le \Vert \mathcal{F}(u) \Vert_{L^m}$ (where $1 \le m \le 2$ and $m,k$ Holder conjugates)

1 vote
Accepted

Is the Fourier Transform of the limit the limit of the Fourier Transform?

1 vote

$ y' = x^2 + y^2 $ asymptote

1 vote
Accepted

Let $f,g$ be differentiable functions such that $\int\limits_0^{f(x)}f(t)g(t)dt=g(f(x))$. Show that $g(0)=0$

1 vote

proof that $a_n$ is a null sequence

1 vote
Accepted

spectral theory of Laplacian on $\mathbb R^n$

1 vote

Uniform convergence defined recursively

1 vote

Compactness of $L^p$ inclusion into $L^q$

1 vote
Accepted

Which of the following is true about $f(x)$?

1 vote
Accepted

Composition of measureable function with continuou function in $L^2[0,1]$

0 votes

Find $\lim \limits_{x\to 8} {\frac{64-x^2}{8-x}}$

0 votes

A basic problem on bounded variation

0 votes

Continuous functions/ Extreme value theorem

0 votes

Are the following two statements about limit true or false? and why?

0 votes

Periodic Solutions for a System

0 votes

Show that $y''+(y^2+2y'^2-1)y'+y=0$ has a periodic solution.

0 votes

Determine the form of solution to differential equation, for particular starting value

0 votes

Stuck on proof of an inequality, xy < $\frac{x^p}{p} + \frac{y^q}{q}$

0 votes

Ignoring the pole?

0 votes

Reference help: asymptotic reducibility of systems