Christian Ivicevic
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 3h asked Solving the IVP given by $\dot x=\frac{t-x}{t+x}$ and $x(0)=1$ 1d asked Gaussian integral $\int_{-\infty}^\infty \exp(-(x+\mathrm iY)^2)\,\mathrm d x$ along $[-R,R]+\mathrm i[0,Y]$ 1d asked Why does $z\mapsto \exp(-z^2)$ have an antiderivative on $\mathbb C$? 2d asked Contour integrals along $\gamma(t)=t+\mathrm it^\alpha$ and a rectangle 2d asked Probability space for zebras and their number of stripes Apr 24 answered $(x-x_0)^0$ in power series Apr 24 asked Holomorphic, entire functions and the Cauchy-Riemann equations Apr 21 asked Show that a power series is analytic inside its radius of convergence Apr 16 asked Exact differential equation $f(t,x)+g(t,x)\dot x=0$ and constants Apr 16 asked When is $\sin\colon\mathbb{C}\to\mathbb{C}$ purely real/imaginary? Apr 1 asked Simplify $(n+1)^{1/\sqrt{n}}$ and $(n^2+1)^{1/n}$ Mar 29 asked Issues computing $\int\cos^2x~\mathrm{d}x$ without using $\sin^2(x)=1-\cos^2(x)$ Mar 26 answered Prove the series $\sum_{n=1}^∞ (-1)^n(n)/(n+2)$ diverges Mar 24 asked Show $\sum_{k=1}^\infty \frac{k^2}{k!} = 2\mathrm{e}$ Feb 12 asked Deducing the series expansion of $\arctan(x^2)$ via the series expansion of $\arctan(x)$ at $x=0$ Jan 27 asked Multivariable taylor series expansion of $\exp(-(x^2+y^2))$ Jan 21 asked Eigenvectors of $\begin{pmatrix}6&2\\-10&-1\end{pmatrix}$ (linear equations with complex numbers) Dec 13 asked ELI5: What are pointwise and uniform convergence and what is the difference? Dec 9 answered Continuous function taking each of its values twice Dec 9 answered Show $\sin(\frac{\pi}{3})=\frac{1}{2}\sqrt{3}$