Polyharmonic spline - Wikipedia

Poluha Facebook, Instagram & Twitter on PeekYou

Spline interpolation - Wikipedia

Polahar Facebook, Instagram & Twitter on PeekYou

Category:Splines - Wikimedia Commons

Polahar Facebook, Instagram & Twitter on PeekYou

Bernstein polynomial - Wikipedia

Poluha Facebook, Instagram & Twitter on PeekYou

Radial basis function - Wikipedia

calculus and analysis - Plotting derivatives of B-splines - Mathematica Stack Exchange