Beamer

Member for 9 years, 6 months
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complex-analysis

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An example of non-closed subspace of a Hilbert space?

Dec 8, 2014

Completeness of solutions and the separation of variables method

Feb 25, 2015

a geometric problem about area

Aug 31, 2017

How to prove this simple fact without using distribution theory?

Mar 5, 2015

Why only densely defined operators can have an adjoint operator?

Dec 8, 2014

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If $f$ is differentiable and $\forall x \in \mathbb R $ and $\forall h >0 ( \mid {f(x+h)-f(x-h)}\mid <h^2 )$ then $f$ is constant?

Apr 28, 2019

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