Aryabhata
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 Nov 12 revised Convergence of $a_{0} = 0, a_{n}=f(a_{n-1})$ when $|f'(x)|\leq \frac{5}{6}$ edited title Nov 12 comment Measure of value of resources in a competitive game Why has this got a close vote? Nov 12 comment Checking if a number is a Fibonacci or not? @QIao: Sorry I meant to say if you want to avoid floating point computations. With proper hardware support floating point computation are O(1). I am not claiming binary search is faster. It was mainly in response to "trusting" the results. strlen x is O(logx) btw. Nov 12 revised Prove the sum of all numbers that do not have a multiplicative inverse mod $n$ attempting again. Nov 12 comment Checking if a number is a Fibonacci or not? @Qiao: Guess an $n$, compute $F_n$ (using matrix powers) and compare with $N$. If the entries are smaller, we need a bigger $n$, else smaller. This might be a bit slower, but that is the price you pay for avoiding floating point computations. Nov 12 comment Convergence of $a_{0} = 0, a_{n}=f(a_{n-1})$ when $|f'(x)|\leq \frac{5}{6}$ Are you missing some condition on $f'(x)$? For instance take $f(x) = -100x + 1$. Perhaps $f'(x) \ge 0$? Nov 12 comment Convergence of $a_{0} = 0, a_{n}=f(a_{n-1})$ when $|f'(x)|\leq \frac{5}{6}$ +1 for showing the work done. Nov 12 comment Checking if a number is a Fibonacci or not? Or we can use binary search and avoid floating point computations altogether. Nov 12 comment Interesting calculus problems of medium difficulty? +1: Can you please be more specific, though? What sub-forums for instance? Nov 12 revised Interesting calculus problems of medium difficulty? added 3 characters in body Nov 12 answered Interesting calculus problems of medium difficulty? Nov 12 answered Interesting calculus problems of medium difficulty? Nov 12 answered Interesting calculus problems of medium difficulty? Nov 12 revised Summing $\frac{1}{e^{2\pi}-1} + \frac{2}{e^{4\pi}-1} + \frac{3}{e^{6\pi}-1} + \cdots \text{ad inf}$ rolled back to a previous revision Nov 12 comment Summing $\frac{1}{e^{2\pi}-1} + \frac{2}{e^{4\pi}-1} + \frac{3}{e^{6\pi}-1} + \cdots \text{ad inf}$ @Derek: i believe it was because of the <. Do you want to rollback to rev 6? Nov 11 comment Find all continuous functions $f$ on $\mathbb{R}$ satisfying $f(x)=f(\sin x)$ for all $x$. I removed the different equations and functional analysis tag. Nov 11 revised Find all continuous functions $f$ on $\mathbb{R}$ satisfying $f(x)=f(\sin x)$ for all $x$. edited tags Nov 11 answered Find all continuous functions $f$ on $\mathbb{R}$ satisfying $f(x)=f(\sin x)$ for all $x$. Nov 11 comment Summing $\frac{1}{e^{2\pi}-1} + \frac{2}{e^{4\pi}-1} + \frac{3}{e^{6\pi}-1} + \cdots \text{ad inf}$ @Derek: Please stop editing! I think I fixed it :-) (See revision 4 or 6) Nov 11 revised Summing $\frac{1}{e^{2\pi}-1} + \frac{2}{e^{4\pi}-1} + \frac{3}{e^{6\pi}-1} + \cdots \text{ad inf}$ rolled back to a previous revision