M. Strochyk
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 1d comment Test $\sum\limits_{n=1}^{\infty} \frac{(-1)^n\ln(n)}{n}$ for convergence Note that $\frac{1}{n^2}(1-\ln(n))<0\$ for all $n \geqslant{3}$ and rejection of a finite number of terms does not affect the convergence Apr21 reviewed Approve Integral domain and ideal of ring Apr21 reviewed Approve Find minimal $x$ and $y$ that creates $4$ Apr17 reviewed Approve Can dx be equal to dy? Apr11 comment Integral of trig fraction using substitution You can check your integration by differentiating the answer $\sqrt{1+2\sin{x}}+c$ Apr10 comment evaluating some limits - calculus Use L'Hôpital's rule to prove that $\lim\limits_{t\to+\infty}\dfrac{e^t}{\ln{t}}=+\infty.$ Apr5 reviewed Reject Does there exist an analytic function s.t. $f\left(\frac{1}{n}\right)=2^{-n}.$ Apr4 reviewed Approve Question about Karp reduction Mar31 revised Physically impossible to find the constant added 155 characters in body Mar31 comment Physically impossible to find the constant In general, the antiderivative of periodic function is not necessarily periodic. For example, the function $f(x)=1+\sin{x}$ is periodic, but its antiderivative $F(x)=x-\cos{x}$ isn't. Mar30 reviewed Approve GCD to LCM of multiple numbers Mar30 answered Physically impossible to find the constant Mar30 reviewed Approve An example of centrally symmetric unbounded set in $\mathbb{R}^2$ which is convex? Mar30 comment $\lim_{n\to\infty}\left(\frac{\log(n+1)}{\log n}\right)^{n}=1$ @John Nicholson: Thanks, you are right. Edited. It was a mechanical mistake; the next lines are correct. Mar30 revised $\lim_{n\to\infty}\left(\frac{\log(n+1)}{\log n}\right)^{n}=1$ deleted 2 characters in body Mar24 reviewed Approve Solve the Integral Equation Involving Laplace Transforms Mar24 reviewed Approve Recurrence relation of $T(n) = T(n^\frac13) + \log n$ Mar23 reviewed Approve Two kind of equations involving natural log and exponentiation Mar22 reviewed Approve Check if a point is inside a rotated 2D NACA 0012 airfoil Mar18 reviewed Approve Prove that if $A$ is an $n\times n$ matrix and $AB=AC$ implies that $B=C$, then $A$ is invertable.