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 Proving the equation $4x^3+6x^2+5x=-7$ has has only one solution using Rolle's or Lagrange's theorem
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