Regular Domain Of $C^{\infty}$
75764
Regularity of a domain - definition
107842
Behaviour of ($\overline{a}_n)_{n=1}^{\infty}$ and ($\underline{a}_n)_{n=1}^{\infty}$
119003
Complement of $c_{0}$ in $\ell^{\infty}$
16984
Finite extension of domains : preimage of non-zero ideal is non-zero?
102914
Integral domain that is not a factorization domain
97782
Why are the domains for $\ln x^2$ and $2\ln x$ different?
77322
Uniform continuity of $\sin(x\sin x )$ for all $x\in (0,\infty)$
136195
Stuck trying to prove that $e^{-x^{-2}}$ is $C^{\infty}$
92588
Showing that $(C_0([0,\infty)), \|\cdot\|_\infty)$ is complete.
158011
$C_c^{\infty}(\mathbb R^n)$ is dense in $W^{k,p}(\mathbb R^n)$
130241
What is the Convergence Radius and Domain of $\sum\limits_{n=0}^\infty \frac{1}{2^{n}} z^{2^n}$?
94819
Prove that $\frac{\mathbb{C}[x,y]}{\langle x^2-y^2-1\rangle}$ is an integral domain such that all the nonzero prime ideals are maximal.
38185
Prove that $\{\cos(nx) : n=1, ... ,\infty \}$ is bounded but not totally bounded in $C([0,\pi])$
109926
Axiom of Regularity and infinite sequences
25397
Prove $R \times R$ is NOT an integral domain
111128
The Duals of $l^\infty$ and $L^{\infty}$
139595
Show that $(l_1)^* \cong l_{\infty}$