WHITNEY THEOREM FOR COPOSITIVE APPROXIMATION IN 1 , ) ( ,  p I L p 

Abstract

In this research, we have important results about finding the relationship between the best approximation degree and the so called modulus ( or Sendov- Popov modulus ) of order in the space , and the polynomial is copositive with the function at the points in an interval , and also found assessment between the best approximation degree by algebraic polynomial of degree , and the modulus of smoothness of degree , to the function , .