Is $|\mathbb{R}^{2}| > |\mathbb{R}|$?
69166
Cardinality of $\mathbb{R}$ and $\mathbb{R}^2$
12825
Bijection between $2^{\mathbb R}$ and $\mathbb{ R ^ R}$
11405
If a nonempty set of real numbers is open and closed, is it $\mathbb{R}$? Why/Why not?
8291
If $n$ vectors are linearly independent, is their span $\mathbb{R}^n$?
108955
Showing $(\mathbb{Q},+)$ is not isomorphic to $(\mathbb{R},+)$
105014
Is the zero vector in $\mathbb{R}^n$ by itself a subspace of $\mathbb{R}^n$?
141114
Question about a bijection between $\mathbb R$ and $\mathbb R \cup \{\infty\}$
109610
Is $\mathbb{R}[X]/(P)$ isomorphic to $\mathbb C$ for every irreducible polynomial $P$ of degree $2?$
81196
Is true that $H^{s,p}(\mathbb{R}^n)\subset C^k(\mathbb{R}^n)$ when $s-k>n/p$?.
109764
Find the cardinality of the quotient of $\mathbb R$ in respect to R
132470
Does $\mathbb R^2$ contain more numbers than $\mathbb R^1$?
70576
Elementary proof that $\mathbb{R}^n$ is not homeomorphic to $\mathbb{R}^m$
96567
Immersion of $\mathbb{R}$ to $\mathbb{R}^2$
35569
Prove that $[0,1]$ isn't homeomorphic to $\mathbb{R}$
11620
Is it true that any matrix in $M_2(\mathbb R)$ is the sum of two squares?
146243
Does there exist a matrix $\mathbf{A}\in\mathbb{R}^{3\times3}$ such that $\mathbf{A}^{2}=-\mathbf{I}$?
157924
$\forall x\in\mathbb{N}[(\exists y\in\mathbb{N}(2\leq y\land y<x\land y\ |\ x))\to(\exists z\in\mathbb{N}(2\leq z\land z\leq\sqrt x\land z\ |\ x))]$