BT1.SIF

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* SET UP THE INITIAL DATA *
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NAME          BT1

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

*   Source: problem 1 in
*   P.T. Boggs and J.W. Tolle,
*   "A strategy for global convergence in a sequential 
*    quadratic programming algorithm",
*   SINUM 26(3), pp. 600-623, 1989.

*   SIF input: Ph. Toint, June 1993.

*   classification QQR2-AN-2-1

VARIABLES

    X1
    X2

GROUPS

 N  OBJ       X1        -1.0
 E  CON1

CONSTANTS

    BT1       OBJ       100.0
    BT1       CON1      1.0

BOUNDS

 FR BT1       'DEFAULT'

START POINT

 XV BT1       X1        0.08
 XV BT1       X2        0.06

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        100.0          E2        100.0
 E  CON1      E1        1.0            E2        1.0

OBJECT BOUND

*   Solution

*LO SOLTN               -1.0

ENDATA

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* SET UP THE FUNCTION *
* AND RANGE ROUTINES  *
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ELEMENTS      BT1

INDIVIDUALS

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

ENDATA