Mathematics
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40 votes's user avatar
40 votes
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answer
51
Upper bound for $( a_1 + a_2 + \cdots + a_n)^{1/2}$
Jul 16, 2013
answer
31
Why do we need semi-norms on Sobolev-spaces?
Jul 8, 2013
answer
30
Show that $f(C)$ has Hausdorff dimension at most zero.
Jul 17, 2013
answer
26
What is the purpose of subtracting the mean from data when standardizing?
Jul 23, 2013
answer
23
What is the most efficient numerical base system?
Jul 18, 2013
answer
21
Big O notation sum rule
Jul 24, 2013
answer
20
The dual of the Sobolev space $W^{k,p}$
Jul 21, 2013
answer
15
When can a non-autonomous system NOT be re-written as an autonomous system?
Jul 11, 2013
answer
15
$U = (I-iT) (I + iT) ^ {-1}$ is a unitary operator when T is self-adjoint
Jul 26, 2013
answer
14
How can it be proved that the geometric mean function is concave?
Jul 26, 2013
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