User Felice Iandoli - MathOverflow Meta

Felice Iandoli

Member for 9 years, 2 months
Last seen more than 2 years ago

iandolifelice.github.io/math
Trieste

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18

How to prove the spectrum of the Laplace operator $\Delta: H^2(\mathbb{R}^N)\rightarrow L^2(\mathbb{R}^N)$ is $\sigma(\Delta)=[-\infty,0]$?

13

Hardy–Littlewood-Sobolev inequality without Marcinkiewicz interpolation?

9

Knight's metric: ellipse and parabola.

7

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

6

Lagrange/Cauchy mean value theorem