Unisolvent point set
In approximation theory, a finite collection of points  is often called unisolvent for a space  if any element  is uniquely determined by its values on . is unisolvent for  (polynomials in n variables of degree at most m) if there exists a unique polynomial in  of lowest possible degree which interpolates the data . Simple examples in  would be the fact that two distinct points determine a line, three points determine a parabola, etc. It is clear that over , any collection of k + 1 distinct points will uniquely determine a polynomial of lowest possible degree in . See also
Padua points

External links
Numerical Methods / Interpolation

Approximation theory