Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

  7. current community

    your communities

    more stack exchange communities

    company blog
Mathematics
Meta user
Network profile

Communities (14)

Top network posts

Top tags (103)

Score 165
Posts 12
Posts % 10
Score 89
Posts 6
Score 72
Posts 6
Score 63
Posts 8
Score 44
Posts 14
Score 38
Posts 15
View all tags →

Top posts (119) All Questions Answers | Votes Newest

92 $\lim\limits_{n \to{+}\infty}{\sqrt[n]{n!}}$ is infinite Apr 25 '12
63 Why “characteristic zero” and not “infinite characteristic”? Jan 12 '12
38 Prove that the function$\ f(x)=\sin(x^2)$ is not uniformly continuous on the domain $\mathbb{R}$. Oct 23 '12
37 Prove that $(p+q)^m \leq p^m+q^m$ Dec 23 '12
26 Induction: $\sum_{k=0}^n \binom nk k^2 = n(1+n)2^{n-2}$ Nov 6 '12
26 Lower bound for $\phi(n)$: Is $n/5 < \phi (n) < n$ for all $n > 1$? Jan 23 '12
19 A structural proof that $ax=xa$ forms a monoid Jan 7 '13
19 When is $\sin(x)$ rational? Dec 2 '11
18 The General Validity of $ab=cd$ Implies $ba=dc$. Jun 28 '13
12 Proof that $\binom{2\phi(r)}{\phi(r)+1} \geq 2^{\phi(r)}$ Dec 30 '11
View all questions and answers →

Badges (77)

Gold

1

Rarest

Silver

26

Rarest

Bronze

50

Rarest

View all badges →