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 Mar 1 comment How do I represent this in terms of m and x i think you just proved that $E$ is independent of $x$... Mar 1 revised How do I represent this in terms of m and x edited tags Mar 1 comment Simply this formula what is $\sum [\cdot]$ can you please rewrite your formulae to make them readable? Mar 1 revised Simply this formula added 8 characters in body Mar 1 answered About Euler's formula $e^{ix}=\cos x+i\sin x$ Mar 1 revised About Euler's formula $e^{ix}=\cos x+i\sin x$ added 18 characters in body; edited title Feb 29 revised What does strength refer to in mathematics? edited body Feb 29 revised What does strength refer to in mathematics? added 137 characters in body Feb 29 answered What does strength refer to in mathematics? Feb 23 comment Partition of number's squares The first $n$ I can see this is possible for is $n=8$, and the greedy algorithm from the largest number produces the partitioning. Not sure this will or will not work for $n=1000$ Feb 23 comment Partition of number's squares Why do you think this is necessarily possible? Feb 23 revised Partition of number's squares added 7 characters in body; edited tags Feb 23 comment The function $f (x) = f \left (\frac x2 \right ) + f \left (\frac x2 + \frac 12\right)$ the only thing i can see is that $$f(x+1)-f(x) = f(x/2+1)-f(x/2)$$ and $f(1/2)=0$ Feb 22 revised Problem finding Jacobian when computing density added 33 characters in body Feb 22 comment $\sigma$-algebra generated by a subset @Clarinetist, no, it's the smallest also because it is the minimum extension of the current set to a sigma-algebra. So suffices to find one, and show that none of its subsets are sigma algebras. Feb 22 revised 2 dimensional packing Problem with flexible objects added 3 characters in body Feb 22 revised 2 dimensional packing Problem with flexible objects edited tags Feb 22 revised Matrix rank inequality deleted 2 characters in body; edited tags Feb 22 answered $\sigma$-algebra generated by a subset Feb 22 comment How to find second order derivative when i posted an answer, i made a mistake in calculations, so i thought i well knew what the answer was. as for this comment, it is not an answer, just a suggestion along which lines i would think...