Wed Mar 18 10:09:35 2020 

sa_test
  R version 3.4.4 (2018-03-15) 
  sa seeks the minimum of a function using simulated annealing.

  sa(polynomial, 0) =  3.612569  f(x) =  -78.18373 
  sa(polynomial, 0) =  3.61281  f(x) =  -78.18371 

sa_test
  Normal end of execution.
Wed Mar 18 10:09:36 2020