01 - UNCONSTRAINED MINIMIZATION
-------------------------------


      CALL EIUD01(N,X,FMIN,XMAX,NEXT,IEXT,IERR)

         N - NUMBER OF VARIABLES (INPUT-DECLARED, OUTPUT-ACTUAL)
         X(N) - INITIAL VECTOR OF VARIABLES (OUTPUT)
         FMIN - LOWER BOUND OF OBJECTIVE FUNCTION (OUTPUT)
         XMAX - UPPER BOUND OF STEPSIZE (OUTPUT)
         NEXT - NO. OF PROBLEM (INPUT): THERE IS 25 PROBLEMS
                (NEXT FROM 1 TO 25)
         IEXT - TYPE OF EXTREMUM (0-MINIMUM, 1-MAXIMUM)
         IERR - CONFLICT IN INPUT DATA IF IERR <> 0 (OUTPUT)


      CALL EFFU01(N,X,F,NEXT)

         N - NUMBER OF VARIABLES (INPUT)
         X(N) - ACTUAL VECTOR OF VARIABLES (INPUT)
         F - VALUE OF THE OBJECTIVE FUNCTION (OUTPUT)
         NEXT - NO. OF PROBLEM (INPUT)


      CALL EFGU01(N,X,G,NEXT)

         N - NUMBER OF VARIABLES (INPUT)
         X(N) - ACTUAL VECTOR OF VARIABLES (INPUT)
         G(N) - GRADIENT OF THE OBJECTIVE FUNCTION (OUTPUT)
         NEXT - NO. OF PROBLEM (INPUT)


      CALL EFHD01(N,X,H,NEXT)

         N - NUMBER OF VARIABLES (INPUT)
         X(N) - ACTUAL VECTOR OF VARIABLES (INPUT)
         H(N*(N+1)/2) - HESSIAN MATRIX OF THE OBJECTIVE FUNCTION (OUTPUT)
         NEXT - NO. OF PROBLEM (INPUT)


RECOMMENDED INPUT VALUE N=20
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