User Tong Lingling - Mathematics Stack Exchange

1. Home
2. Questions
3. Unanswered
4. Tags
6. Chat
7. Users
Teams

Ask questions, find answers and collaborate at work with Stack Overflow for Teams.
Try Teams for free Explore Teams
Teams
Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Explore Teams

Tong Lingling

Member for 3 years, 8 months
Last seen this week

Summary

Reputation

261

261
181
101

Aug
Nov
Feb
May

Top tag

number-theory

Next privilege

500 Rep.

Access review queues

Badges

1

7

Newest

Commentator

Next badge

0/1

Critic

Impact

~488

people reached

0

posts edited

0

helpful flags

44

votes cast

Questions

9

Binomial coefficients sum $\sum_{k=1}^{n} \frac{1}{k}\binom{2k}{k}$ when $n>1$, $p=2n+1$ is a prime

Apr 25

2

Primes of the form $p=a^2+b^2$ where $\min\{a,b\}$ exceeds given bound

May 1

2

What is the lower limit of $f(n):= \frac{1}{\ln{(n+1)}}\max_\limits{0\leq{m}\leq{n},m\in\mathbb{N}\\0<{p}\leq{n},p\in\mathbb{P}}\{v_p\binom{n}{m}\}$

May 2

1

Are there infinitely many $n\in\mathbb{N}$ which equals the sum of square of its smallest $k$ divisors?

May 6

Answers

1

What is the lower limit of $f(n):= \frac{1}{\ln{(n+1)}}\max_\limits{0\leq{m}\leq{n},m\in\mathbb{N}\\0<{p}\leq{n},p\in\mathbb{P}}\{v_p\binom{n}{m}\}$

May 3

Tags

View all 11 tags

number-theory

1

Score

5

posts

binomial-coefficients

1

Score

3

posts

limsup-and-liminf

1

Score

2

posts

prime-factorization

1

Score

2

posts

elementary-number-theory

0

Score

2

posts

Reputation

+10

Are there infinitely many $n\in\mathbb{N}$ which equals the sum of square of its smallest $k$ divisors?

+10

What is the lower limit of $f(n):= \frac{1}{\ln{(n+1)}}\max_\limits{0\leq{m}\leq{n},m\in\mathbb{N}\\0<{p}\leq{n},p\in\mathbb{P}}\{v_p\binom{n}{m}\}$

+20

What is the lower limit of $f(n):= \frac{1}{\ln{(n+1)}}\max_\limits{0\leq{m}\leq{n},m\in\mathbb{N}\\0<{p}\leq{n},p\in\mathbb{P}}\{v_p\binom{n}{m}\}$

+10

Primes of the form $p=a^2+b^2$ where $\min\{a,b\}$ exceeds given bound

Badges

View all badges

This user doesn’t have any gold badges yet.

1

silver badge

Yearling

Apr 28

7

bronze badges

Custodian

Apr 25
Commentator

May 4
Teacher

May 3

Accounts

697
1
12

261
1
7

Meta Stack Exchange

101

Active bounties (0)

This user has no active bounties

Votes cast

44

upvotes

30

question votes

14

answer votes

35

this month

21

this week