Injection from $\mathbb{R}$ to $\mathbb{R}/\mathbb{Q}$
63538
Impossibility of constructing a continuum-size linearly independent set in $\Bbb R$
77548
Given an arbitrary infinite set $S$, how to construct an injection $\mathbb{N} \to S$ with the Axiom of Choice?
33330
Continuous Functions from $\mathbb{R}$ to $\mathbb{Q}$
96567
Immersion of $\mathbb{R}$ to $\mathbb{R}^2$
27757
$\mathbb{R}\to\mathbb{R}$ Diffeomorphism with special property
24828
surjective immersion $\mathbb{R}^2 \to \mathbb{R}^2$ which is not a diffeomorphism
42810
Is $(\mathbb{Q},+)$ isomorphic to $(\mathbb{Q}^n,+)$?
74663
Is $\mathbb{R}$ an algebraic extension of some proper subfield?
128917
Inner Product on $\mathbb{R}$ and on $\mathbb{C}$
93017
Isomorphism between $\Bbb R$ and $\Bbb R(X)$?
67234
The function $G: x \mapsto 2^{x^2}$ maps $\mathbb{R}$ onto $\{ x \in \mathbb{R} : x \geq 1 \}$
17525
Why the interior of $\mathbb{Q}$ in $\mathbb{R}$ is empty?
24914
Does every continuous map from $\mathbb{Q}$ to $\mathbb{Q}$ extends continuously as a map from $\mathbb{R}$ to $\mathbb{R}$?
53432
What is the algebraic closure of $\mathbb F_q$?
86015
$\mathbb Q[x]/(x^2+1)$ is not isomorphic to $\mathbb Q[x]/(x^2+2)$
157597
Homeomorphism between $\mathbb{Q}$ and $\mathbb{Q}(>0)$, and $\mathbb{Q}(\ge 0)$
138653
Is $\mathbb{R}$ a subspace of $\mathbb{R}^2$?