Quadratic funding (also known as quadratic finance, liberal radical mechanism, or plural funding) is a public good provision mechanism. Participants can propose public good projects and choose how much to contribute to any potential project. Contributions are matched by taking the square root of each contribution, summing them, and taking the square of the resulting sum. Mathematically, the formula is ${\left({\sum }_{i=1}^n\sqrt{c_i}\right)}^2,$ where $c_i$ represents individual contributions.