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21 votes

Is the space $L^2([0,1],\mathbb{Z})$ homeomorphic to $\ell^2$?

fa.functional-analysis gn.general-topology topological-groups infinite-dimensional-manifolds asked Sep 10 at 7:52
mathoverflow.net

18 votes

Is the minimal volume a topological invariant?

dg.differential-geometry riemannian-geometry differential-topology curvature asked Mar 28, 2023 at 11:37
mathoverflow.net

12 votes

The square of the (Hilbert cube minus 1 point )

gn.general-topology asked Sep 21 at 7:13
mathoverflow.net

11 votes

A topological tree is weakly contractible

at.algebraic-topology gn.general-topology mg.metric-geometry homotopy-theory asked Dec 19, 2022 at 8:58
mathoverflow.net

8 votes

When can we find a net, defined on a totally ordered index set, converging to a non-isolated point in a compact Hausdorff space?

gn.general-topology asked Mar 20, 2023 at 9:32
mathoverflow.net

7 votes

eigenvalues of a first order differential operator on a manifold

linear-algebra functional-analysis differential-geometry smooth-manifolds vector-fields asked Aug 30, 2023 at 11:38
math.stackexchange.com

5 votes

Given a totally ordered system of Banach spaces, can we we always change the norms to get isometric embeddings?

fa.functional-analysis banach-spaces linear-orders asked Dec 16, 2022 at 14:24
mathoverflow.net

5 votes

Questions on Dudley's paper "Formulas for Primes"

calculus elementary-number-theory asked Aug 7, 2023 at 9:07
math.stackexchange.com

5 votes

Can you always extend an isometry of a subset of a Hilbert Space to the whole space?

reference-request fa.functional-analysis mg.metric-geometry hilbert-spaces metric-spaces asked Jul 1, 2024 at 14:34
mathoverflow.net


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