Johannes Kloos
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 Feb 16 reviewed Approve spherical-trigonometry tag wiki Feb 16 reviewed Approve spherical-trigonometry tag wiki excerpt Feb 16 reviewed Approve karush-kuhn-tucker tag wiki excerpt Feb 16 reviewed Approve karush-kuhn-tucker tag wiki Feb 16 reviewed Approve greens-theorem tag wiki excerpt Feb 16 reviewed Approve greens-theorem tag wiki Feb 14 reviewed Reject If $M_t$ is a martingale, is this process a martingale too? Feb 6 reviewed Reject Are these two events $A$ and $B$ independent? Jan 20 reviewed Edit How to integrate exponential and square roots of polynomials? Jan 20 revised How to integrate exponential and square roots of polynomials? Correct spelling in formula and improved layout. Jan 18 revised why $10$ in any base number system written as $10?$ Improved tags Jan 12 comment Help with proving that $\pi$ is irrational $\beta_n \ell$ is not - why? This statement definitely needs proof. Note in particular that since $\beta_n$ is defined as a series, not a sum the "many primes" argument does not work here. Jan 11 reviewed Approve Fermat's Little Theorem and graph cycle length Jan 3 reviewed Approve What is this surface $x^2 + y^2 +2z = 2, z \geq 0$ Jan 3 reviewed Approve Relationship between decay of Fourier transform and smoothness in $L^2$ Jan 3 reviewed Approve Mental Math Question Jan 2 reviewed Leave Closed Defining the pre-image topology for $f:A\rightarrow B$ Jan 2 reviewed Close A twice differentiable function such that $f''$ is continuous Dec 31 reviewed Approve Use de Moivre's formula to write $\cos(n\theta)$ as a polynomial of $\cos\theta$ and $\sin\theta$ Dec 29 reviewed Leave Open Solving $\int_{0}^{\infty} \frac{x^2}{x^8+5}dx$?