Tate's thesis: why is the image of $k$ dense in its Pontryagin dual?
52802
Why is the image of $k^+$ dense in the character group?
127886
Artin's lemma and some morphisms.
92740
prove that $\mathbb{Q}^n$is dense subset of $\mathbb{R^n}$
109080
Is the kernel of a map to a finitely presented module finitely generated?
81112
Proving that the dual of the $\mathcal{l}_p$ norm is the $\mathcal{l}_q$ norm.
67460
Orientation on $\mathbb{CP}^2$
113614
Approximating the density of $S\cap[a,b]$ using a Folner Sequence of $A$, where $S \subseteq A$?
156679
$K[X,Y]/(XY-1)$ not isomorphic to $K[T]$
52354
Given a idempotent endomorphism, show that $M = \ker(f) \oplus \ker (f-\text{id}_M)$
108305
How can we show that the dyadic rationals are dense in $\mathbb R$?
35105
Density of ring of algebraic integers in $\mathbb C$
28324
Inverse image of the sheaf associated to a module
137761
Why are the fundamental and anti-fundamental representation in $\text{SL}(2,\mathbb{C})$ not equivalent?
132653
How to show that $\mathfrak{sl}_n(\mathbb{R})$ and $\mathfrak{sl}_n(\mathbb{C})$ are simple?
40490
Birational isomorphism $\mathbb{P}^n\times \mathbb{P}^m\to \mathbb{P}^{n+m}$
97009
Image of ring homomorphism $\phi : \mathbb{Z}[t] \to \mathbb{Q}$?
150337
Let $K$ be a subfield of $\mathbb{C}$ not contained in $\mathbb{R}$. Show that $K$ is dense in $\mathbb{C}$.