Top network posts

• 20 Prove that the sum of pythagorean triples is always even
• 15 A real function problem
• 12 Prove $\lim\limits_{n\to \infty}\frac{1}{\sqrt n}\left|\sum\limits_{k=1}^n (-1)^k\sqrt k\right|= \frac{1}{2}$
• 8 Does this conjecture about prime numbers exist? If $n$ is a prime, then there is exist at least one prime between $n^2$ and $n^2+n$.
• 8 Let $a_n=\cos(a_{n-1}), L=[a_1,a_2,...,a_n,...].$ Is there an $a_0$ such that $L$ is dense in$[-1,1]?$
• 8 Sophie Germain-like primes and Cunningham-like chains
• 8 Finding a closed form for recurrence relations $a_n=na_{n-1}+1$ and $a_n=na_{n-1}+n$
• View more network posts →