List questions from geometric-functional-analysis

Published on 22 Feb 2026 - 20:08

168

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How to vary a second order function with respect to the metric tensor?

Published on 22 Feb 2026 - 21:58

370

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About non-separable Hilbert spaces

Published on 22 Feb 2026 - 21:55

123

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Differentiability of Norms of $l_{\infty}$

Published on 22 Feb 2026 - 21:20

292

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Realizing the Berkovich affine line as a union of Berkovich spectrums

Published on 22 Feb 2026 - 22:03

155

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Definition of the Berkovich spectrum

Published on 22 Feb 2026 - 22:02

232

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Distance between two functions in term of a third function

Published on 22 Feb 2026 - 21:56

99

Views

Prove that $\forall t \in \mathbb R$ the set $f^{-1}(\{t\})$ is a hyperplane of $X$

Published on 22 Feb 2026 - 22:04

744

Views

Hahn Banach Theorem implying existence of a nonzero linear functional taking 0 in a linear subspace

Published on 22 Feb 2026 - 22:01

973

Views

Given a "composite" norm, what polygon describes its unit ball?

Published on 22 Feb 2026 - 21:57

165

Views

Proving that the norm of a linear and surjective operator is 1 (Step in Figiel's Theorem)

Published on 22 Feb 2026 - 22:01

95

Views

Homeomorphism between a piece of sphere and a convex set on a Banach space.

Published on 22 Feb 2026 - 23:41

51

Views

Proving three convex surfaces intersect using 2 Dimensional intermediate value theorem

Published on 22 Feb 2026 - 23:32

306

Views

Applications of Sard's Theorem.

Published on 22 Feb 2026 - 23:37

38

Views

refering something as "non-linear" when there is no underlying linear structure

Published on 22 Feb 2026 - 23:33

List Question

Bound degrees of sparse random graphs

How to vary a second order function with respect to the metric tensor?

About non-separable Hilbert spaces

Differentiability of Norms of $l_{\infty}$

Realizing the Berkovich affine line as a union of Berkovich spectrums

Definition of the Berkovich spectrum

Distance between two functions in term of a third function

Prove that $\forall t \in \mathbb R$ the set $f^{-1}(\{t\})$ is a hyperplane of $X$

Hahn Banach Theorem implying existence of a nonzero linear functional taking 0 in a linear subspace

Given a "composite" norm, what polygon describes its unit ball?

Proving that the norm of a linear and surjective operator is 1 (Step in Figiel's Theorem)

Homeomorphism between a piece of sphere and a convex set on a Banach space.

Proving three convex surfaces intersect using 2 Dimensional intermediate value theorem

Applications of Sard's Theorem.

refering something as "non-linear" when there is no underlying linear structure

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