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Mathematics
Tong Lingling's user avatar
Tong Lingling's user avatar
Tong Lingling's user avatar
Tong Lingling
  • Member for 3 years, 8 months
  • Last seen this week
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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
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
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14
Where did this theorem appear?
13
Six consecutive positive integers with certain shape
6
Elementary question about a biquadratic Diophantine equation
6
Find the smallest odd integer $n>1$ such that $\phi(\tau(n))=\tau(\phi(n))$
6
Six consecutive positive integers with certain shape