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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...