The teen applied his skills to a type of math called partial differential equations. (sciencenewsforstudents.org)
The ensemble Kalman filter (EnKF) is a recursive filter suitable for problems with a large number of variables, such as discretizations of partial differential equations in geophysical models. (en.wikipedia.org)
They have to solve partial differential equations for each of these elements and then intelligently couple them to all the other equations. (sciencedaily.com)