Is $\mathbb Z[i/2]:=\{f(i/2) : f(x) \in \mathbb Z[x] \}$ dense in $\mathbb C$?
135441
When is $\mathbb{Z}[\alpha]$ dense in $\mathbb{C}$?
77903
Finding the integral closure of $\mathbb{Z}$ in $\mathbb{Q}[i]$
76501
How can we show that $\mathbb Q$ is not a free $\mathbb Z$-module?
138026
To show that $n!f(x) \in \mathbb{Z}[x]$
85870
Show this set is a base for some topology on $\mathbb{Z}$
108305
How can we show that the dyadic rationals are dense in $\mathbb R$?
154847
homomorphism from $S_3$ to $\mathbb Z/3\mathbb Z$
132382
Showing a set is nowhere dense in $C([0,1])$
26749
$\mathbb{Z}[X]/(X^2-1)$ is not isomorphic with $\mathbb{Z}\times \mathbb{Z}$
92211
When are $\mathbb Z_m$ and $\mathbb Z_n$ homomorphic?
66313
$\mathbb{Z}[i]/(a+bi) \cong \mathbb{Z}_{a^2+b^2}$ if $(a,b)=1$
111898
Is $\{ (e^{2\pi i a n},e^{2\pi i b n }) : n \in \mathbb{Z} \}$ dense in the torus, where $a,b$ irrationals such that $a/b$ irrational?
155165
Prove that $\mathbb F_8=\mathbb F_2[X]/(X^3+X+1)$
114916
$\mathbb Z_{mn}$ isomorphic to $\mathbb Z_m\times\mathbb Z_n$ whenever $m$ and $n$ are coprime
8434
Order of $\mathbb{Z}[i]/(1+i)$
149328
A function such that $f:\mathbb C \to \mathbb C$ such that $f(z)f(iz)=z^2$ satisfies $f(z)+f(-z)=0$.(MADHAVA-2020)
135772
how to show image of a non constant entire function is dense in $\mathbb{C}$?