ELI5: Explain Like I'm 5

Euler–Tricomi equation

The Euler–Tricomi equation is a mathematical equation that allows us to find the shape of a surface when we know its shape under certain conditions. For example, it may help us figure out the shape of something like a hillside when we know a couple of points on it, like the top and bottom, and some information about what is happening in between. It takes this information and calculates the shape of the surface.