New posts in banach-spaces

Compact operators on an infinite dimensional Banach space cannot be surjective

Linear functional on a Banach space is discontinuous then its nullspace is dense.

Show that $\liminf_{n\to \infty}x_{n}\le\alpha(x)\le\limsup_{n\to\infty}x_{n}$ for $x=(x_{n})$ in $\ell^{\infty}$

Compact operator maps weakly convergent sequences into strongly convergent sequences

Sum of the sets in a Banach space

Norm for pointwise convergence

Is $\overline{T(\overline{B_X})} = \overline{T(B_X)}$?

A Hamel basis for $\ell^p$?

At most finitely many (Hamel) coordinate functionals are continuous - different proof

Isometric Embedding of a separable Banach Space into $\ell^{\infty}$

Are the coordinate functions of a Hamel basis for an infinite dimensional Banach space discontinuous?

Weak-to-weak continuous operator which is not norm-continuous

Banach Spaces - How can $B,B',B'', B''', B'''',B''''',\ldots$ behave?

When is the image of a linear operator closed?

If $1\leq p < \infty$ then show that $L^p([0,1])$ and $\ell_p$ are not topologically isomorphic

Prove that $C^1([a,b])$ with the $C^1$- norm is a Banach Space

On the norm of a quotient of a Banach space.

T is finite rank operator represent [closed]

Examples of incomplete normed spaces of continuous linear maps between two normed spaces [duplicate]

How to show that quotient space $X/Y$ is complete when $X$ is Banach space, and $Y$ is a closed subspace of $X$?