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1h
answered Have you seen these integer factorization algorithms before?
1h
revised Showing a certain cyclotomic polynomial must split
added 17 characters in body
1h
answered Showing a certain cyclotomic polynomial must split
4h
comment How many scientists can survive?
@Brilliand Except implicitly by submitting my attempt in the first place, I didn't say $76$ was optimal (it is merely the best choice for my type of approach). And at the time of my writing the better solutions were almost all flawed. But I agree that this answer is now very inferior. I guess I shall still keep it alive for its different approach
5h
answered Number of functions for $(f(x))^2=x^2$
5h
revised Does a vector have to be continuous to fall within a set?
added 13 characters in body; edited title
5h
answered Last digits of sum $n!+m!$
5h
answered How calculate: $\lim \limits_{(x,y) \to (0,0)} \frac{ln(1+2x^2+4y^2)}{arctan(x^2+2y^2)} $?
5h
revised How calculate: $\lim \limits_{(x,y) \to (0,0)} \frac{ln(1+2x^2+4y^2)}{arctan(x^2+2y^2)} $?
deleted 1 character in body; edited title
5h
answered Probability to get from point A to point B.
6h
answered Is the mapping $f\colon\mathbb{R}\to\mathbb{R}$ defined by $f(x)=5x^3+3$ onto?
6h
answered A real $2 \times 2 $ matrix $M$ such that $M^2 = \tiny \begin{pmatrix} -1&0 \\ 0&-1-\epsilon \\ \end{pmatrix}$ , then :
6h
revised Let $f\colon [a,b]\to\mathbb R$ is continuous and $G(x,t)=t(x-1)$ when $t\leq x$ and $x(t-1)$ when $t\geq x$.
added 61 characters in body; edited title
6h
comment Let $f\colon [a,b]\to\mathbb R$ is continuous and $G(x,t)=t(x-1)$ when $t\leq x$ and $x(t-1)$ when $t\geq x$.
@moon1234 Thanks, edited the typo. Don't see the mistake in 3rd so - anyway, you could just as well work from the second line
6h
revised Let $f\colon [a,b]\to\mathbb R$ is continuous and $G(x,t)=t(x-1)$ when $t\leq x$ and $x(t-1)$ when $t\geq x$.
edited body
10h
comment Partitioning a graph such that size of cut is maximum for number of vertices odd
On the other hand, $>m/2$ seems to be true as soon as $m>0$, for not all cuts can have $m/2$ then (for example if $V_1=\emptyset$) ...
10h
answered Finding roots in finite fields.
10h
revised Find the least degree Polynomial whose one of the roots is $ \cos(12^{\circ})$
added 11 characters in body
10h
revised Find the least degree Polynomial whose one of the roots is $ \cos(12^{\circ})$
added 11 characters in body; edited title