DEFINITION MODULE ChDerInt;

   (* EXPORT QUALIFIED ChInt, ChDer; *)

   FROM NRVect IMPORT Vector;

   PROCEDURE ChInt(a, b:    REAL; 
                   C, CINT: Vector); 
   (*
     Given a,b,C, as output from routine ChebFt
     section 5.6, the desired degree of approximation
     (i.e., elements C[0, n-1] are to be used),
     this routine returns the array CINT[0, n-1], the Chebyshev
     coefficients of the integral of the function whose coefficients are C.
     The constant of integration is set so that the integral vanishes at a.
   *)

   PROCEDURE ChDer(a, b:    REAL; 
                   C, CDER: Vector); 
   (*
     Given a,b,C, as output from routine ChebFt
     section 5.6, and given n, the desired degree of approximation
     (i.e., elements C[0, n-1] are to be used),
     this routine returns the array CDER[0, n-1], the Chebyshev
     coefficients of the derivative of the function whose coefficients are C.
   *)

END ChDerInt.