HS23.SIF

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* SET UP THE INITIAL DATA *
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NAME          HS23

*   Problem :
*   *********

*   Source: problem 23 in
*   W. Hock and K. Schittkowski,
*   "Test examples for nonlinear programming codes",
*   Lectures Notes in Economics and Mathematical Systems 187, Springer
*   Verlag, Heidelberg, 1981.

*   SIF input: A.R. Conn, April 1990

*   classification QQR2-AN-2-5

VARIABLES

    X1
    X2

GROUPS

 N  OBJ

 G  CON1      X1        1.0            X2        1.0
 G  CON2
 G  CON3
 G  CON4      X2        -1.0
 G  CON5      X1        -1.0

CONSTANTS

    HS23      CON1      1.0
    HS23      CON2      1.0
    HS23      CON3      9.0

BOUNDS

 XL HS23      'DEFAULT' -50.0
 XU HS23      'DEFAULT' 50.0

START POINT

    HS23      X1        3.0
    HS23      X2        1.0

ELEMENT TYPE

 EV SQ        V1

ELEMENT USES

 T  E1        SQ
 V  E1        V1                       X1

 T  E2        SQ
 V  E2        V1                       X2

GROUP USES

 E  OBJ       E1                       E2
 E  CON1
 E  CON2      E1                       E2
 E  CON3      E1        9.0            E2
 E  CON4      E1
 E  CON5      E2


OBJECT BOUND

 LO HS23                0.0

*   Solution

*LO SOLTN               2.0

ENDATA

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* SET UP THE FUNCTION *
* AND RANGE ROUTINES  *
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ELEMENTS      HS23

INDIVIDUALS

 T  SQ
 F                      V1 * V1
 G  V1                  V1 + V1
 H  V1        V1        2.0

ENDATA