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Oct
9
reviewed Reject
Oct
7
comment minimum number of times to change tyres.
To be honest, I do not even know how to prove the above solution is optimal. I cannot find any better solution does not constitute a proof!
Oct
7
asked minimum number of times to change tyres.
Oct
5
reviewed Edit definition of a sufficient statistic
Oct
5
comment Holder continuity constant and dervative.
I also know my fn are monotonically decreasing. Somehow my set of conditions allows to prove something, but it is hard to write down all of them
Oct
5
comment Holder continuity constant and dervative.
no, i have proved it before, but i forgot how it was done now...
Oct
5
comment Holder continuity constant and dervative.
Yes, also i know the derivatives of fn are bounded. I know f has derivatives everywhere except at one point, where it still admits left and right derivative, but not sure if they agree. Also fn and f are all convex.
Oct
5
asked Holder continuity constant and dervative.
Oct
3
comment If $f$ is continuously differentiable in $[a,b]$, $f(a)=f(b)$, and $f'(a)=f'(b)$, then there exist $a<x_1<x_2<b$ such that $f'(x_1) = f'(x_2)$.
i dont understand the down votes, because the arguments seems fine to me.
Oct
3
comment Variation of Coupon Collector's Problem
However, I also have to factor in the fact that the boxes themselves also have a probability to dispense coupons. -- not concise, in my opinion.
Oct
3
reviewed Looks OK if I know $f(x+1) = 2f(x) + 1$, how do I solve f(x)
Oct
3
reviewed Reopen Gaussian curvature of the graphs of the real and imaginary parts of an analytic function.
Oct
3
reviewed Reopen The projection onto a subspace of a Hilbert space is the nearest point
Oct
3
reviewed Approve Prove: if $x$ is even, then $x + 5$ is odd.
Oct
3
comment Variation of Coupon Collector's Problem
All of the parameters in the geometric distributions are halved, hence mean doubles... I do not understand your explanation, but you probably understood it. You can view as getting a geometric (p) but rejected with probability 1/2. This halves the parameter.
Oct
3
comment Variation of Coupon Collector's Problem
surely, this is just the answer of the normal problem, doubled?
Oct
2
reviewed Looks OK Using sA+tB to derive equation of line.
Oct
2
reviewed Looks OK Integral of $\sin(\pi x) \cos(n\pi x)$ and $\sin(\pi x) \sin(n\pi x)$
Oct
2
asked Extension continuous function on an open cube in $R^n$
Sep
18
awarded  Popular Question