Nathan Edwards
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 Nov 6 awarded Scholar Nov 6 accepted Does Euler Characteristic > 2 imply not connected Nov 6 revised Given $f(f(x))$ can we find $f(x)$? Clarified the no answer Nov 6 suggested approved edit on Given $f(f(x))$ can we find $f(x)$? Nov 6 comment Does Euler Characteristic > 2 imply not connected Thanks. What about for simplicial complexes in general? Are there bounds? Nov 6 asked Does Euler Characteristic > 2 imply not connected Nov 1 awarded Supporter Nov 1 comment Which one of the following is true for all vectors $u$, $v$ and $w$ where $u\cdot v = 0$ and $u\cdot w = 0$? I think the question I originally answered for a) is actually more interesting as it's a common misconception that two vectors that dot with a third to zero must be parallel to each other. Nov 1 awarded Editor Nov 1 awarded Teacher Nov 1 revised Which one of the following is true for all vectors $u$, $v$ and $w$ where $u\cdot v = 0$ and $u\cdot w = 0$? Corrected misreading and provided counter-examples Nov 1 comment Which one of the following is true for all vectors $u$, $v$ and $w$ where $u\cdot v = 0$ and $u\cdot w = 0$? Hi @Daryl. I misread the question... $u$ looks like $v$, I'll edit! Nov 1 answered Which one of the following is true for all vectors $u$, $v$ and $w$ where $u\cdot v = 0$ and $u\cdot w = 0$?