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 Excavator
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Aug
24
awarded  Excavator
Aug
24
revised Show that there is no function $\phi\in C^2(\mathbb R^3,\mathbb R)$ such that $\nabla \phi=(-y,x,0)^t$
added 2 characters in body
Aug
24
revised Show that there is no function $\phi\in C^2(\mathbb R^3,\mathbb R)$ such that $\nabla \phi=(-y,x,0)^t$
title edited
Aug
24
suggested approved edit on Show that there is no function $\phi\in C^2(\mathbb R^3,\mathbb R)$ such that $\nabla \phi=(-y,x,0)^t$
Jan
4
accepted Dixmier-Douady class: computations
Dec
19
awarded  Caucus
Nov
27
comment Is the translation of open and closed sets to some language non-antonym preserving?
Interesting, thanks.
Nov
27
asked Is the translation of open and closed sets to some language non-antonym preserving?
Jul
2
awarded  Curious
Jun
5
awarded  Yearling
Jun
2
revised Show that there is no function $\phi\in C^2(\mathbb R^3,\mathbb R)$ such that $\nabla \phi=(-y,x,0)^t$
deleted 44 characters in body
Jun
2
answered Show that there is no function $\phi\in C^2(\mathbb R^3,\mathbb R)$ such that $\nabla \phi=(-y,x,0)^t$
Apr
16
comment Is this already an equation/law that has been found?
I've only seen that attribution in "Die Vermessung der Welt".
Feb
10
accepted Homotopy of a (non-spherical) cow.
Feb
7
revised Homotopy of a (non-spherical) cow.
deleted 518 characters in body
Feb
7
revised Homotopy of a (non-spherical) cow.
deleted 518 characters in body
Feb
7
asked Homotopy of a (non-spherical) cow.
Jun
5
awarded  Yearling
May
30
awarded  Citizen Patrol
May
23
revised How to express $2 \cos X = \sin X$ in terms of $\sin X$?
added a tag