Aryabhata
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 Jan 29 revised Proving that $\sin1$(radian) is irrational without using Taylor Series Expansion. edited tags Jan 29 comment Irrational numbers in reality This is not a mathematical question. Seems like you found a bug around getting close votes by offering a bounty :-) I have flagged for migration to physics.se, so let's see. Jan 27 comment Can't figure out $O(n \log n)$ divide-and-conquer algorithm You could implement so it is $\Omega(n \log n)$ instead of $O(n)$ though... Jan 27 revised Can't figure out $O(n \log n)$ divide-and-conquer algorithm edited tags Jan 27 comment Can't figure out $O(n \log n)$ divide-and-conquer algorithm This is the famous maximum sum subarray problem... Jan 27 answered Can't figure out $O(n \log n)$ divide-and-conquer algorithm Jan 27 comment Why $\sum_{j=1}^mj^p \sim m^{p+1}$ as $n\to\infty$? @Lionville: Ok, good to know you haven't ignored it completely :-) Jan 27 comment How to proceed with the following integration? Manish, this site has latex support using MathJax, please use it instead of posting image links. Here is a reference: meta.math.stackexchange.com/questions/5020/… Jan 27 revised How to proceed with the following integration? added 88 characters in body Jan 27 revised Why $\sum_{j=1}^mj^p \sim m^{p+1}$ as $n\to\infty$? added 101 characters in body Jan 27 comment Calculating Euler's totient function values. @Amad27: Once you solve this yourself (based on OohAah's comment), please add an answer and tick that. Jan 27 comment Calculating $\sum_{k=0}^{n-1}\frac{1}{a+bk^2}$. A closed form is unlikely, but you can try and use Euler-MacLaurin Summation formula, which is beyond algebra-precalculus. Jan 27 answered Why $\sum_{j=1}^mj^p \sim m^{p+1}$ as $n\to\infty$? Jan 27 revised Calculating Euler's totient function values. edited tags Jan 27 answered nth derivative of a troublesome function Jan 27 comment Number of real roots of $2 \cos\left(\frac{x^2+x}{6}\right)=2^x+2^{-x}$ @mathamphetamines: The question is asking for the number of real roots. What prevents it from being 42 or infinity or etc? Jan 27 revised Number of real roots of $2 \cos\left(\frac{x^2+x}{6}\right)=2^x+2^{-x}$ edited tags Jan 27 revised Show that $n^4+4$ is not a prime number edited tags Jan 26 comment Remove minimal number of elements Search the web for sum free subsets. Jan 26 revised Prove, inequality ,positive numbers edited tags