User Muzi - Physics Stack Exchange

Muzi

Member for 6 years, 6 months
Last seen more than 2 years ago

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Mar 30, 2017

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17

Completeness of $\{ f_n : n \in \mathbb N \} \subset C[0,1]$ in $L^1[0,1]$

13

Does the identity $\cos^2(x)+\sin^2(x)=1$ hold in a unital Banach algebra where $1$ is the unit?

10

(Fundamental) Solution of the Helmholtz equation

8

Is it true that $ S(x)^2 \geq S'(x)\int_{-\infty}^{x}S(t) \, dt$, where $S(x) = A\gamma(x) + \gamma(x-C)$ and $\gamma$ is the standard Gaussian?

6

Does the inclusion $A \subset B$ for closed densely defined operators $A$ and $B$ imply $A=B$?