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Dec
14
comment Estimating the mode
@alex.jordan Sampling without replacement would make the question rather easy as you say. I don't have a fixed idea for how to estimate the mode's frequency given the sample but I was thinking that you could maybe look at the frequency of the mode of the sample and try to adjust that for the sample size you have taken.
Dec
14
asked Estimating the mode
Sep
6
comment Expected time to get from bottom left to top right in a square
Can you give any intuition for why it might be much quicker to get to the opposite corner than to some point in the middle of the side? This isn't obvious to me.
Jul
17
revised Entropy of matrix vector product
added 122 characters in body; edited tags
Jul
17
awarded  Curious
Jul
16
revised Entropy of matrix vector product
added 25 characters in body
Jul
16
revised Entropy of matrix vector product
added 10 characters in body
Jul
16
comment Entropy of matrix vector product
@robjohn Does the edit make it clearer?
Jul
16
revised Entropy of matrix vector product
added 279 characters in body
Jul
15
revised Entropy of matrix vector product
added 43 characters in body
Jul
15
revised Entropy of matrix vector product
edited tags
Jul
15
asked Entropy of matrix vector product
May
13
revised Why are two statements about a polynomial equivalent?
fixed brackets and fractions
May
13
suggested approved edit on Why are two statements about a polynomial equivalent?
May
13
comment Which vectors can give zero inner products forever
I expect this is obvious to an expert, but does this answer mean there are vectors $v$ other than the ones the OP listed or not?
Apr
21
awarded  Nice Question
Apr
3
comment Are the entries in matrix/vector product independent
Yes but your argument makes no reference to that. It would seem to apply equally to the $0,1$ case. What is it about $\pm 1$ that is making the difference?
Apr
3
comment Are the entries in matrix/vector product independent
Not so fast! If the vector $v$ had values which were $0$ or $1$ the $y_i$ would not be independent. If you knew, for example that the first half of the $y_i$'s were $0$ it would be a good guess the next half has plenty of $0$s in it too.
Feb
13
comment Smallest non-zero eigenvalue of a (0,1) matrix
Cross-posted to mathoverflow.net/questions/157472/… now.
Feb
7
comment How to use the generating function $F(x) =x/(1-x-x^2).$
I simply took the third derivative of $x/(1-x-x^2)$ by hand. This is $6(x^4 + 6 x^2 + 4 x + 2)/(x^2+x-1)^4$.