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286/80 answers
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 Revival
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7m
comment Is it possible to develop Analysis solely from Peano's axioms
There are many different types of integrals. Which would you choose?
9m
accepted Are there any solutions to $2g(x+y)-g(x-y) =2g(x)g(y)$ with $g(0) \ne 0$?
5h
revised Solving functional equation gives incorrect function
additional info
5h
asked Are there any solutions to $2g(x+y)-g(x-y) =2g(x)g(y)$ with $g(0) \ne 0$?
5h
answered Solving functional equation gives incorrect function
7h
comment Solving functional equation gives incorrect function
What other equations?
2d
answered Proving $\sum_{i=1}^n 2^i = 2^{n+1} - 2$ using strong induction
2d
comment Center of gravity of a hollow or solid semi sphere
That's nice. What have you tried?
Jul
31
awarded  Revival
Jul
31
comment Closed-form of $\int_0^1 \frac{\operatorname{Li}_2\left( x \right)}{\sqrt{1-x^2}} \,dx $
David H: I recommend that you post yours anyway. It's good when a complicated calculation is replicated independently.
Jul
31
answered Asymptotic of Inverse Function
Jul
31
comment Segments of a hypotenuse
The perpendicular to the hypotenuse divides the triangle into to triangles both similar to the original triangle.
Jul
30
comment Show that $(1+p/n)^n$ is a Cauchy sequence for arbitrary $p$
$a^2$ is the $C$, $x^2$ is $n^2$.
Jul
30
answered Show that $(1+p/n)^n$ is a Cauchy sequence for arbitrary $p$
Jul
30
comment Show that $(1+p/n)^n$ is a Cauchy sequence for arbitrary $p$
I have added an answer that proves the estimate for $\ln(1+z)$. It should be a comment, but that would be a real pain.
Jul
30
answered Is it possible to figure out the coefficients of an exponential equation given a certain number of points?
Jul
30
comment A conjecture about “equiharmonic numbers” of Flajolet via Doron Zeilberger
How would I search for "$\wp(z,\Lambda)$"? It looks to me like a Weierstrass Elliptic Function, but, after having looked it up, it seems beyond my pay grade. If you can make any sort of start on this, I will be glad to accept it.
Jul
29
comment $\int_{-\infty}^{\infty}e^{-\pi x^2}\cdot e^{-2\pi ix\xi}dx = e^{\pi\xi^2}$
So why does this work? I have never gotten an incorrect result by naively doing complex math in real integrals and then returning to real expressions.
Jul
29
answered Area of regular n-gon without trig?
Jul
29
answered Derivation of the equation for the envelope