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May
2
accepted PID question in Ireland and Rosen
Apr
30
accepted Intuition behind normal subgroups
Apr
13
accepted Lang's proof of Cauchy's Theorem
Mar
27
accepted Proving $\frac{\cos(t \arctan(\sqrt{x}))}{(1+x)^{t/2}}= \sum_{k \ge 0}\frac{\Gamma(t+2k)\Gamma(k+1)}{\Gamma(t)\Gamma(2k+1)}\frac{(-x)^k}{k!}$
Mar
24
accepted Isomorphism between this subgroup of complex numbers and all finitely generated abelian groups ?
Mar
20
accepted A closed form for $\sum_{i\cdot j^k=n}(-1)^i$?
Mar
19
accepted Ramanujan's 'well known' integral, $\int_\frac{-\pi}{2}^\frac{\pi}{2} (\cos x)^m e^{in x}dx$.
Feb
23
accepted Bessel functions: proof that $J_0(z)=\frac{1}{\pi}\int_0^\pi e^{i z \cos(\theta)}d \theta$.
Feb
1
accepted Ramanujan's partial fraction decomposition of $\frac{1}{(x^2+a^2)\cdots(x^2+(a+n)^2)}$.
Dec
21
accepted Why does $\lim_{x \rightarrow 0} B(x,y)$ exist and how is it calculated?
Dec
7
accepted Closed form for $\int_0^1 \frac{x^a dx}{(1+x^b)^c}$.
Nov
28
accepted Are there non-affine matrices?
Nov
27
accepted Is there a link between divergent series and discontinuities in Fourier integrals?
Oct
30
accepted Why are two directions enough for the Cauchy-Riemann equations to imply differentiability?
Oct
27
accepted $\int_0^{\frac{\pi}{2}}x\cot(x)dx$ and $ \lim_{m \rightarrow \infty}\log\left( e^{2m}\left(\frac{(2m-1)!!}{(2m+1)^m}\right)^2\right)$.
Sep
28
accepted Find $\int_{0}^{\frac{\pi}{2}} \ln(\sin(x)) \ln( \cos(x))\,\mathrm dx$
Sep
28
accepted Prove that $\sum_{n=1}^\infty \frac{\sigma_a(n)}{n^s}=\zeta(s)\zeta(s-a)$
Sep
6
accepted Where's the mistake in this proof of Euler's reflection formula?
Aug
29
accepted Evaluating $\int\frac{dr}{r\sqrt{ar^2+br+c}}$, Landau's 'elementary' integral
Aug
19
accepted Calculating $\frac{\Phi_p(x^n)}{\Phi_p(x)}$ using generating functions or inclusion-exclusion