code: function complexMultiply(a, b){
                  return [(a[0] * b[0] - a[1] * b[1]), 
                          (a[0] * b[1] + a[1] * b[0])];
              }
docs: /*
  ComplexMultiply
  
  From complex.js in fft-js in https://github.com/vail-systems/node-fft
  
  (c) Vail Systems. Joshua Jung and Ben Bryan. 2015