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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions

6 votes
3 answers
593 views

Non-trivial solution to $\sum^{n}_{i=1}\sum^{n}_{j=1,j\ne i}(x_{i})^{(x_j)}=(\sum^{n}_{i=1}x...

This problem was first asked at Mathematics Stack Exchange, where it wasn't drawn much attention. For ease of reading, $$S=\sum_{i=1}^nx_i, S_p=\sum_{i=1,i\ne p}^nx_i, S^{[q]}=\sum_{i=1}^nx_i^q, S_p^{ …
Alex-Github-Programmer's user avatar
0 votes

Non-trivial solution to $\sum^{n}_{i=1}\sum^{n}_{j=1,j\ne i}(x_{i})^{(x_j)}=(\sum^{n}_{i=1}x...

The results are shown in this answer. The upper bound of $S^{S_n}$. I proved that $S^{S_n}\le n(n-1)$. @mathlove commented that $S^{S_n}\le n(n-1)/2$. I proved that $S^{S_n}\le\frac{n^2-3n-6}2$. The …
Alex-Github-Programmer's user avatar