This namespace contains a discussion of polynomial interpolation, and different
methods for fitting a polynomial of degree N-1 to N points and evaluating that
polynomial at some different `x`.

This namespace contains a discussion of rational function interpolation, and
different methods for fitting rational functions N points and evaluating them
at some value `x`.

Richardson interpolation is a special case of polynomial interpolation; knowing
the ratios of successive `x` coordinates in the point sequence allows a more
efficient calculation.