The difference between $\mathbb{C}$ and $\mathbb{R}^2$
57967
Difference between $\mathbb C$ and $\mathbb R^2$
132470
Does $\mathbb R^2$ contain more numbers than $\mathbb R^1$?
71767
What is the difference between $\Bbb{R^n}\times\Bbb{R^m}$ and $\Bbb{R^{m+n}}$?
41872
Show that $\mathbb{R}^2$ is not homeomorphic to $\mathbb{R}^2 \setminus\{(0,0)\}$
86741
Relation between different definitions of degree in complex geometry
109610
Is $\mathbb{R}[X]/(P)$ isomorphic to $\mathbb C$ for every irreducible polynomial $P$ of degree $2?$
147047
Does there exist a polynomial $p(x) \in \mathbb C[x]$ such that $p(x) \notin \mathbb R[x]$ and $p(x)p(-x)=p(x^2)$?
148685
Equivalences of definitions of submanifolds in $\mathbb{R^n}$
120235
Clarification of the notation $f: \mathbb{R} \setminus\{3\} \to\mathbb{R}\setminus\{2\}$
84148
Why is $\mathbb{R}^2$ not a subspace of $\mathbb{R}^3$?
108156
Algebraic closure of $\mathbb{C}(x)$ is isomorphic to $\mathbb{C}$
124688
Question about a metric on $\mathbb{R}^2$
141799
Is $2^{|\mathbb{N}|} = |\mathbb{R}|$?
5250
Are $T\mathbb{S}^2$ and $\mathbb{S}^2 \times \mathbb{R}^2$ different?
84869
Are the groups $\mathbb{C}$ and $\mathbb{R}$ isomorphic?
108955
Showing $(\mathbb{Q},+)$ is not isomorphic to $(\mathbb{R},+)$
35305
Why is $\mathbb{R}^2$ not a subset and /or a subspace of $\mathbb{R}^3$?