List questions from banach-spaces

Published on 25 Mar 2026 - 15:39

128

Views

Differentiability of Norms of $l_{\infty}$

Published on 25 Mar 2026 - 14:26

53

Views

Identification of the ultraproduct of dual space as subset of the dual of ultraproduct.

Published on 25 Mar 2026 - 3:04

167

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Does Bounded Closed Subset of Banach Space Attain Suprermum?

Published on 02 Jun 2018 - 16:23

77

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On a density principle found in Gröchenig's book.

Published on 02 Jun 2018 - 20:03

94

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Apparent contradiction in linear operator theory

Published on 03 Jun 2018 - 1:50

41

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Does $\{e_n\}$ have a cluster point?

Published on 06 Jun 2018 - 8:53

130

Views

Extremal points in $L^1(\mathbb{R})$

Published on 06 Jun 2018 - 10:11

63

Views

Complemented sub-spaces in a non-separable space.

Published on 07 Jun 2018 - 16:37

439

Views

On the space of continuous functions of a second-countable space

Published on 25 Mar 2026 - 11:33

98

Views

Unique Solution in a Banach Space

Published on 08 Jun 2018 - 13:00

105

Views

Find a Unique Bounded Linear Mapping in the Hilbert Space

Published on 25 Mar 2026 - 6:19

446

Views

Space of linear and bounded operators is Banach

Published on 08 Jun 2018 - 21:22

123

Views

Let X be a Banach space, and x,y ∈ X. Show that if ℓ(x) = ℓ(y) for every ℓ ∈ X′, then x = y.

Published on 09 Jun 2018 - 2:02

258

Views

Quasinilpotent operators satisfying a polynomial identity

Published on 09 Jun 2018 - 5:21

List Question

Need help in proving $P$ is a projection.

Differentiability of Norms of $l_{\infty}$

Identification of the ultraproduct of dual space as subset of the dual of ultraproduct.

Does Bounded Closed Subset of Banach Space Attain Suprermum?

On a density principle found in Gröchenig's book.

Apparent contradiction in linear operator theory

Does $\{e_n\}$ have a cluster point?

Extremal points in $L^1(\mathbb{R})$

Complemented sub-spaces in a non-separable space.

On the space of continuous functions of a second-countable space

Unique Solution in a Banach Space

Find a Unique Bounded Linear Mapping in the Hilbert Space

Space of linear and bounded operators is Banach

Let X be a Banach space, and x,y ∈ X. Show that if ℓ(x) = ℓ(y) for every ℓ ∈ X′, then x = y.

Quasinilpotent operators satisfying a polynomial identity

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