Mathematics
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user614287
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Love maths!

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Score Newest
question
26
Prove that there exists a triangle which can be cut into 2005 congruent triangles.
Nov 26, 2018
question
7
Determine all functions $f : \mathbb{N} \rightarrow \mathbb{N}$ such that, for every positive integer $n$, we have: $2n+2001≤f(f(n))+f(n)≤2n+2002$.
Nov 26, 2018
answer
7
Can an undirected graph be disconnected?
Dec 4, 2018
answer
6
If a graph has a chromatic number $k$, then for any color there is a vertex of that color that has as neighbors all the other colors
Nov 18, 2018
answer
5
If $H$ is a subgroup with prime index $p$ of a finite simple group $G$, then $p$ is the maximal prime $p$ dividing $|G|$.
Nov 19, 2018
question
4
Different methods to calculate the limit of $\frac{a_nb_0+...+a_0b_n}{n}$
Nov 15, 2018
question
3
Show the abelianization of braid broup $B_n$,$n\geq 2$ is isomorphic to $\mathbb{Z}$
Nov 11, 2018
question
3
Maximum length perimeter of a box whose diagonal is 10 unit long.
Nov 13, 2018
question
3
Set of sets such that any three of them has nonempty intersection. Show all of them have nonempty intersection.
Nov 14, 2018
question
3
$\sum_{i=1}^{\infty}\frac{1}{a_i}$ converges.,prove that $\lim_{n \to \infty}\frac{b_n}{n}=0$.
Nov 23, 2018
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5
"Everywhere" as 到处都 or 到处都是
5
必／会， 这个句子为什么用”必“？必 vs 会？ Why does this sentence use "必“？
5
Difference between 一般 and 一样 meaning “same”

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