Andrey Rekalo
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# 35 Posts

 Jan 3 answered Lipschitz flows on Banach spaces Dec 27 asked Volumes of n-balls: what is so special about n=5? Dec 23 answered Spreading points in the unit interval to maximize the product of pairwise distances Dec 23 answered famous space curves in geometry history? Dec 22 answered How to check if transformation is affine? Dec 18 answered Invariant Subspace Problem Dec 17 answered Geometric intuition for the Householder transformation Dec 11 answered Domain of the Gamma function Dec 11 answered The fractional parts of the powers of the golden ratio are not equidistributed in [0,1] Dec 9 answered An orthonormal set cannot be a basis in an infinite dimension vector space? Dec 8 answered Proving that the sequence $F_{n}(x)=\sum\limits_{k=1}^{n} \frac{\sin{kx}}{k}$ is boundedly convergent on $\mathbb{R}$ Dec 7 answered Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$ Dec 4 answered An integrable function with many discontinuities Dec 3 answered Showing $1,e^{x}$ and $\sin{x}$ are linearly independent in $\mathcal{C}[0,1]$ Dec 1 answered Get $\pi$ decimals manually Nov 20 answered Is $L^2(\mathbb{R})$ with convolution a Banach Algebra? Nov 10 answered Intuitive explanation of a positive-semidefinite matrix Nov 10 answered $\frac{\mathrm d^2 \log(\Gamma (z))}{\mathrm dz^2} = \sum\limits_{n = 0}^{\infty} \frac{1}{(z+n)^2}$ Nov 9 answered Proving $\lim_{n \to \infty} 2^{2n-1} \sqrt{n} \frac{ \Gamma(n)^{2}}{\Gamma(2n)} = \sqrt{\pi}$ Nov 9 answered Suggesting closed-form representations of mathematical constants by means of experimental mathematics?