Siméon Denis Poisson

1. Poisson Distribution

Probability of a given number of events occurring in a fixed interval.

$$ P(k) = \frac{\lambda^k e^{-\lambda}}{k!} $$

2. Poisson Equation

Generalization of Laplace's equation for systems with charge/mass density.

$$ \nabla^2 \varphi = f $$