User:Quasipodo/sandbox

Testing formulas with mediawiki format:

Let $$n$$ be the number of contributors and $$y_i$$ the contribution of individual $$i$$, with $$ y_i, \text{i = 1 to n} $$, indexed in non-decreasing order $$ (y_i \leq y_{i+1}) $$ then $$G = \frac{1}{n - 1} \left( n + 1 - 2 * \left( \frac{\sum_{i=1}^{n} ( n + 1 - i) * y_i}{\sum_{i=1}^{n} y_i} \right) \right).$$