Polyharmonic spline

Polyharmonic spline is a way of smoothing data points. It's used in math and computer programming to make sure a pattern or image looks nice. It takes messy data points and connects them together so that everything looks smoother and matches up. Think of it like connecting all of the dots in a connect-the-dots game, only this game uses a lot of dots! This neat and tidy line is called a polyharmonic spline.