Density in $\mathbb R$
29965
Proving that $m+n\sqrt{2}$ is dense in $\mathbb R$
107564
If two sets have a natural (asymptotic) density, does their union?
137030
Why are there more Irrationals than Rationals given the density of $Q$ in $R$?
84766
Density can be transferred by a homeomorphism?
12212
Showing a certain subspace of Hilbert space is dense
44685
Inner product on $C(\mathbb R)$
32503
Density of the sum of $n$ uniform(0,1) distributed random variables
104234
What is the Hausdorff dimension of the set of irrationals on $\mathbb R^1$
77129
Density of irrationals
158011
$C_c^{\infty}(\mathbb R^n)$ is dense in $W^{k,p}(\mathbb R^n)$
98772
Continuity of a function in $\mathbb{R}$
132382
Showing a set is nowhere dense in $C([0,1])$
67244
Why is $L^1(\mathbb{R}^n) \cap L^2(\mathbb{R}^n)$ dense in $ L^2(\mathbb{R}^n)$?
156783
$\mathbb R$ has the same cardinality of any interval
124728
Density of random variables
77957
How is $\mathbb N$ actually defined?
57839
Real analysis: density and continuity