What are the interior and boundary of $\Bbb R^2 - \{(x,sin(1/x))|x>0\}$ in $\Bbb R^2$?
55839
Interior of the Graph of $\sin(1/x)$
31303
If $p\in\Bbb Z[X]$ show that: $ \max\limits_{x\in [0,1]}\left|p(x) \right| > \frac{1}{e^{n}}. $
3856
Uniform Continuity of $x \sin x$
69871
How to prove Poincaré-like inequality for the integral over the boundary?
1986
Show $1/(1+ x^2)$ is uniformly continuous on $\Bbb R$.
121198
$W^{1,1}(\mathbb{R}^n)$ is not compactly embedded in $L^1(\mathbb{R}^n)$?
138653
Is $\mathbb{R}$ a subspace of $\mathbb{R}^2$?
47680
Prove that the union of the interior of a set and the boundary of the set is the closure of the set
131082
Proof that $\mathbb R/[0,1]$ and $\mathbb R$ are homeomorphic
54638
Integral $\int^{ \pi /2}_{0} \ln (\sin x)\ dx$
101448
Is $\sin^2(z) + \cos^2(z)=1$ still true for $z \in \Bbb{C}$?
14158
Prove that $R$ is an integral domain $\Leftrightarrow$ $R[x]$ is an integral domain
93017
Isomorphism between $\Bbb R$ and $\Bbb R(X)$?
50344
What is the closure of an open ball $B_X(\mathbf{a},r)$ in $X=\mathbb{R}^n$?
42494
The boundary is a closed set
20810
Boundary of Ball of radius R has zero measure
136980
Prove there exists $a\in \Bbb{R}$ such that $f'(a)=0$.