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Mathematics
Donnie Darko's user avatar
Donnie Darko's user avatar
Donnie Darko's user avatar
Donnie Darko
  • Member for 4 years, 3 months
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4
Hardy field in o-minimal structure. Reconciling two points of view
Mar 25
3
prove that $S^1$ is smooth submanifold of $\mathbb{R}^2$ using the definition with diffeomorphism
Oct 23, 2020
3
Is $\log u\in W^{1,p}_{loc}(\Omega)$ if $u\in W^{1,p}_{loc}(\Omega)~~u>0$??
Jan 28, 2021
3
Restrictions of $Gal(\overline{\mathbb{F}_{q}}/\mathbb{F}_{q})$ to $\mathbb{F}_{q^{m}}$ are exactly $Gal(\mathbb{F}_{q^{m}}/\mathbb{F}_{q})$
Aug 3, 2021
2
$\varphi(x)=0$ for every continuous linear form implies that $x=0$
Sep 28, 2020
2
$f,g\in \mathscr{L}(E)$ $f\circ g=0$ and $f+g\in GL(E)$ with $dim(E)<\infty$, then $rank(f)+rank(g)=dim(E)$
Dec 31, 2021
2
$\mathcal{Z}\models \phi(13)$ if and only if $\mathcal{Z}\models\phi(-13)$
Dec 4, 2023
2
If the exponential is definable in an expansion of $\mathbb{\overline{R}},$ then it is definable without parameters
Feb 9
1
every function in $C^k_0(U)$ is $C^k_0(\mathbb{R}^d)$
Jan 19, 2021
1
solve the equation $1+2z+2z^2+\ldots +2z^{n-1}+z^n=0$
Oct 6, 2021