Find $A \subseteq \mathbb{R}$ which is ishomorphic to $\omega^3$
45878
Elementary Set Theory: Ordinals, Well Orderings and Isomorphisms
74330
$\mathbb{R}^n$ not homeomorphic to open subset of $\mathbb{R}^m$
86309
Whether the set $A$ is a compact subset of $M_3(\Bbb R)$.
67279
Is the union of finitely many open sets in an omega-cover contained within some member of the cover?
6270
Poincaré inequality for a subspace of $H^1(\Omega)$
141114
Question about a bijection between $\mathbb R$ and $\mathbb R \cup \{\infty\}$
75829
Dimension of open subsets of $R^n$
77323
Existence of continuous angle function $\theta:S^1\to\mathbb{R}$
72644
Continuous injective map $f:\mathbb{R}^3 \to \mathbb{R}$?
117793
Finding a function $\mathbb{N} \to \mathbb{N}$ that is surjective but not injective.
18334
Equivalence between CH and existence of certain sets in $\mathbb{R}^2$
91222
Isomorphism between $\mathfrak o(4,\mathbb R)$ and $\mathfrak o (3,\mathbb R) \oplus\mathfrak o (3,\mathbb R) $
129813
Is there an easy proof for ${\aleph_\omega} ^ {\aleph_1} = {2}^{\aleph_1}\cdot{\aleph_\omega}^{\aleph_0}$?
112008
Ordinal $\omega_1$ is not compact
42358
Find a Borel subset satisfying the condition
80827
Let $A$ be a nonempty subset of $\mathbb{R}$. Prove...
148516
Proof that $\omega^\omega$ is completely metrizable and second countable