27 - UNCONSTRAINED SUM OF SQUARES MINIMIZATION
----------------------------------------------


      CALL EIUD27(N,NA,X(N),FMIN,XMAX,NEXT,IEXT,IERR)

         N - NUMBER OF VARIABLES (INPUT-DECLARED, OUTPUT-ACTUAL)
         NA - NUMBER OF FUNCTIONS IN THE SUM OF SQUARES
                (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 ARE 82 PROBLEMS
                (NEXT FROM 1 TO 82)
         IEXT - TYPE OF EXTREMUM (0-MINIMUM, 1-MAXIMUM)
         IERR - CONFLICT IN INPUT DATA IF IERR <> 0 (OUTPUT)


      CALL EAFU27(N,KA,X,FA,NEXT)

         N - NUMBER OF VARIABLES (INPUT)
         KA - INDEX OF THE GIVEN FUNCTION IN THE SUM OF SQUARES (INPUT)
         X(N) - ACTUAL VECTOR OF VARIABLES (INPUT)
         FA - VALUE OF THE GIVEN FUNCTION WITH THE INDEX KA (OUTPUT)
         NEXT - NO. OF PROBLEM (INPUT)


      CALL EAGU27(N,KA,X,GA,NEXT)

         N - NUMBER OF VARIABLES (INPUT)
         KA - INDEX OF THE GIVEN FUNCTION IN THE SUM OF SQUARES (INPUT)
         X(N) - ACTUAL VECTOR OF VARIABLES (INPUT)
         GA(N) - GRADIENT OF THE GIVEN FUNCTION WITH THE INDEX KA (OUTPUT)
         NEXT - NO. OF PROBLEM (INPUT)


RECOMMENDED INPUT VALUES N=20 AND NA=400
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