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An expert is a man who has made all the mistakes, which can be made, in a very narrow field. (Niels Bohr)


Apr
24
reviewed Close Game theory:Baye's rule for tournament
Apr
24
comment Intuition on Wald's equation without using the optional stopping theorem.
@Did The English language is not my native language. I understood the expression 'rather moot' as meaning 'debatable'. But it can also be understood as 'irrelevant'.
Apr
24
awarded  Deputy
Apr
24
comment Intuition on Wald's equation without using the optional stopping theorem.
@Did, could you explain me better what becomes the debatable point in wald's equation?
Apr
24
reviewed Approve suggested edit on $ a+b+c+d=6 , a^2+b^2+c^2+d^2=12$ $\implies$ $ 36 \leq 4(a^3+b^3+c^3+d^3)-(a^4+b^4+c^4+d^4) \leq48 $
Apr
24
reviewed Reject suggested edit on The number of rational solutions to the cubic analogue of Pell's equation
Apr
24
accepted Intuition on Wald's equation without using the optional stopping theorem.
Apr
24
reviewed Close Establish that 7 is a primitive root of any prime of the form $p = 2^{4n} + 1$.
Apr
24
reviewed Close Prove if $f(x) = g(x)$ for each rational number x and $f$ and $g$ are continuous, then $f = g$
Apr
24
reviewed Close Showing that $f(x) = g(x)$ $\forall x$ if $f(r) = g(r)$ for all rationals $r$
Apr
24
reviewed Close Fermat's Equation
Apr
22
reviewed No Action Needed How find the $AP+\frac{1}{2}BP$ minmum value
Apr
22
reviewed No Action Needed How could I have found the closed form of $\sum_{k=1}^n \frac{k}{(k+1)!}$ in advance?
Apr
22
reviewed Reviewed Area of a Parallelogram
Apr
20
comment What should one do if one works on a problem and submits a paper only to find that it is already in some book?
@MathAM You could paper to write a review if the path you took if your work is essentially different from the work done in the book.
Apr
20
reviewed Reviewed What should one do if one works on a problem and submits a paper only to find that it is already in some book?
Apr
20
reviewed Reject suggested edit on How many functions are there to a set with A elements from a set with B elements?
Apr
20
reviewed Reject suggested edit on Roots of monic polynomials
Apr
20
revised $XD = DX$ then $X$ is diagonal
added 76 characters in body
Apr
20
answered $XD = DX$ then $X$ is diagonal