dashdart
Reputation
1,526
Top tag
Next privilege 2,000 Rep.
 Dec 11 suggested approved edit on Evaluate $\int\frac{1}{r \ln(r)} \ dr$ Oct 27 revised Proving that $2^{2^n} + 5$ is always composite by working modulo $3$ Tex formatting Oct 27 suggested approved edit on Proving that $2^{2^n} + 5$ is always composite by working modulo $3$ Sep 2 revised How to find eigenvectors/eigenvalues of a matrix where each diagonal entry is scalar $d$ and all other entries are $1$ Tex formatting, edited phrasing of the question and edited title Sep 2 suggested approved edit on How to find eigenvectors/eigenvalues of a matrix where each diagonal entry is scalar $d$ and all other entries are $1$ Aug 26 comment Proving $n^4 + 4 n^2 + 11$ is $16k$ sos440's comment is better justified by noticing that if $n$ is even, then so is $n^4+4n^2$. Hence $n^4+4n^2+11$ has to be odd (since $11$ is an odd number). Aug 24 revised Solving an augumented matrix (A|B) with same matrix coeff Tex formatting and edits in Phrasing Aug 24 suggested approved edit on Solving an augumented matrix (A|B) with same matrix coeff Aug 24 revised Prove that if $n$ is a positive integer then $2^{3n}-1$ is divisible by $7$. added 3 characters in body Aug 23 revised Prove that if $n$ is a positive integer then $2^{3n}-1$ is divisible by $7$. added 593 characters in body Aug 23 comment Prove that if $n$ is a positive integer then $2^{3n}-1$ is divisible by $7$. So if $2^{3n}$, when divided by $7$ leaves a remainder of $1$, what remainder must $2^{3n}-1$ (which is, as you may have noticed, $1$ less than $2^{3n}$) leave when divided by 7? Aug 23 answered Prove that if $n$ is a positive integer then $2^{3n}-1$ is divisible by $7$. Aug 22 revised Is $\sum \sin{\frac{\pi}{n}}$ convergent? Tex formating Aug 22 suggested approved edit on Is $\sum \sin{\frac{\pi}{n}}$ convergent? Aug 20 comment Why isn't math on the sine of angles the same as math on the angles in degrees? @tomasz, "The thing is, before applying a „rule”, you should verify if it is actually true." that is exactly my point. I don't know why you disagree :) Aug 20 comment Why isn't math on the sine of angles the same as math on the angles in degrees? (+1) for the 'In maths it's the single most important thing to stick to given rules and not accidentally "invent" new ones.' Aug 15 answered A question on iterated sums Aug 15 revised Proving that $\mu$ is $\sup S$ added 8 characters in body Aug 14 revised Proving that $2^{2^n} + 5$ is always composite by working modulo $3$ deleted 591 characters in body Aug 14 comment Proving that $2^{2^n} + 5$ is always composite by working modulo $3$ First of all, please do note that I am not comparing my answers with others. Now that I read my answer, I realize that I badly phrased my little disclaimer :) What I mean to say is I have included parts like "...this means that any even power of 2 is 1 greater than some multiple of 3..." in my answer which are obvious. So I guess I need to edit/ delete the disclaimer, eh?