Compact operator for which the image of the closed unit ball is not compact
140756
Image of closed unit ball under a compact operator
64261
example of not surjective isometry on a bounded not closed set.
123197
$C^2 $embedded in holder space?
26794
Metrizability of Hausdorff continuous image of compact metric space
102048
Closure of a compact set in Regular space $ X $
43053
$L^2$ function with compact support is in $L^1$?
29303
Cartesian product of compact sets is compact
124239
example of compact operator
99179
Continuous function with compact domain has continuous inverse
47251
Non-compactness of $\mathbb{R}$ with the cocountable topology
32555
Prove: The weak closure of the unit sphere is the unit ball.
114813
Proof: in $\mathbb{R}$, $((0,1),|\cdot|)$ is not compact.
31002
Proving that the unit ball in $\ell^2(\mathbb{N})$ is non-compact
71371
Nonnegativity of integral, integral operator
28819
A union of two subspaces not equal to the vector space.
59697
Is the boundary of the unit sphere in every normed vector space compact?
142901
"The closure of the unit ball of $C^1[0, 1]$ in $C[0, 1]$" and its compactness