Homeomorphism between $\mathbb{Q}\cap[0,1]$ and $\mathbb{Q}\cap(0,1)$
91736
Explicit homeomorphism between open and closed rational intervals?
52354
Given a idempotent endomorphism, show that $M = \ker(f) \oplus \ker (f-\text{id}_M)$
36631
Is $[0,1] \cap \Bbb Q$ a compact subset of $\Bbb Q$?
143043
When is a local homeomorphism a covering map?
16228
Show that there is sequence of homeomorphism polynomials on [0,1] that converge uniformly to homeomorphism
42810
Is $(\mathbb{Q},+)$ isomorphic to $(\mathbb{Q}^n,+)$?
27670
Group homomorphisms $\mathbb{Q}\to\mathbb{R}$
145077
A continuous bijection $f:\mathbb{R}\to \mathbb{R}$ is an homeomorphism?
91222
Isomorphism between $\mathfrak o(4,\mathbb R)$ and $\mathfrak o (3,\mathbb R) \oplus\mathfrak o (3,\mathbb R) $
27188
Bijection between $\mathbb{R}$ and $\mathbb{R}/\mathbb{Q}$
35569
Prove that $[0,1]$ isn't homeomorphic to $\mathbb{R}$
52135
Show that $A \setminus ( B \setminus C ) \equiv ( A \setminus B) \cup ( A \cap C )$
77563
Homeomorphism between spaces equipped with cofinite topologies
38378
$M= \{ A \in Mat_{2 \times 2}{\mathbb{R}}| \det(A)=1 \}$ is homeomorphic to $S^{1} \times \mathbb{R}^{2}$
131082
Proof that $\mathbb R/[0,1]$ and $\mathbb R$ are homeomorphic
41035
Mapping that proves $\mathbb{Z} \subset \mathbb{Q}$
51687
Is the set $ \ (\mathbb{Z}_p \setminus \mathbb{Z}) \cap \mathbb{Q}$ non-empty?