Anjan Debnath
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 Apr18 accepted Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct? Apr17 accepted How to evaluate $\sum\limits_{n=1}^\infty (-1)^{n-1} \ln (1+\frac1n)$ Apr17 asked How to evaluate $\sum\limits_{n=1}^\infty (-1)^{n-1} \ln (1+\frac1n)$ Apr17 revised Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct? edited title Apr17 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 :-( Apr17 asked Is my proof that $\frac{\pi}{4}=\sum\limits_{n\geq 0}(-1)^n \frac{1}{2n+1}$ correct? Apr17 answered Power Series representation of $\frac{x^3}{(3x+4)^2}$ Apr16 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 $\alpha$ Apr16 suggested approved edit on Prove that $1-\frac{1}{1+\frac{\alpha}{nm}}\leq \sqrt{1-\frac{1}{1+\frac{\alpha}{n}}}\sqrt{1-\frac{1}{1+\frac{\alpha}{m}}}$. Apr15 comment Why $n^{d(n)/2}$ is not getting satisfied? got that. thanks Apr15 asked Why $n^{d(n)/2}$ is not getting satisfied? Apr8 awarded Excavator Apr8 revised Show that $abc=[ab,bc,ca]*(a,b,c)=(ab,bc,ca)*[a,b,c]$ $a,b \in \mathbb N$. Show that $abc=[ab,bc,ca](a,b,c)=(ab,bc,ca)[a,b,c]$ Apr8 suggested approved edit on Show that $abc=[ab,bc,ca]*(a,b,c)=(ab,bc,ca)*[a,b,c]$ Mar20 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? Mar20 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? Mar20 accepted How to solve $(xy)^2+a(xy)+bx+cy+d=0$ in integers? Mar4 revised Sylvester's dialectic method added 29 characters in body Mar4 comment Sylvester's dialectic method Thank you so much (infinitely many :-) ) My problem is solved Mar4 asked Sylvester's dialectic method