Reputation
1,157
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2 13
Newest
 Excavator
Impact
~9k people reached

Apr
18
accepted Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct?
Apr
17
accepted How to evaluate $\sum\limits_{n=1}^\infty (-1)^{n-1} \ln (1+\frac1n)$
Apr
17
asked How to evaluate $\sum\limits_{n=1}^\infty (-1)^{n-1} \ln (1+\frac1n)$
Apr
17
revised Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct?
edited title
Apr
17
comment Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct?
I tried but it requires 3 more votes :-(
Apr
17
asked Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct?
Apr
17
answered Power Series representation of $\frac{x^3}{(3x+4)^2}$
Apr
16
revised Prove that $1-\frac{1}{1+\frac{\alpha}{nm}}\leq \sqrt{1-\frac{1}{1+\frac{\alpha}{n}}}\sqrt{1-\frac{1}{1+\frac{\alpha}{m}}}$.
a to $\alpha$
Apr
16
suggested approved edit on Prove that $1-\frac{1}{1+\frac{\alpha}{nm}}\leq \sqrt{1-\frac{1}{1+\frac{\alpha}{n}}}\sqrt{1-\frac{1}{1+\frac{\alpha}{m}}}$.
Apr
15
comment Why $n^{d(n)/2}$ is not getting satisfied?
got that. thanks
Apr
15
asked Why $n^{d(n)/2}$ is not getting satisfied?
Apr
8
awarded  Excavator
Apr
8
revised Show that $abc=[ab,bc,ca]*(a,b,c)=(ab,bc,ca)*[a,b,c]$
$a,b \in \mathbb N$. Show that $abc=[ab,bc,ca](a,b,c)=(ab,bc,ca)[a,b,c]$
Apr
8
suggested approved edit on Show that $abc=[ab,bc,ca]*(a,b,c)=(ab,bc,ca)*[a,b,c]$
Mar
20
accepted How to evaluate $\frac{1}{2\pi i}\int_C \frac{f(z) dz}{(z-z_1)^{m_1}(z-z_2)^{m_2}}$ and the other related contour?
Mar
20
asked How to evaluate $\frac{1}{2\pi i}\int_C \frac{f(z) dz}{(z-z_1)^{m_1}(z-z_2)^{m_2}}$ and the other related contour?
Mar
20
accepted How to solve $(xy)^2+a(xy)+bx+cy+d=0$ in integers?
Mar
4
revised Sylvester's dialectic method
added 29 characters in body
Mar
4
comment Sylvester's dialectic method
Thank you so much (infinitely many :-) ) My problem is solved
Mar
4
asked Sylvester's dialectic method