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Removed Instance ship

This version of ship corresponds to a earlier version of GAMS model library model ship, which had been "disimproved", so it became unbounded.
Formats ams gms mod nl osil py
Primal Bounds (infeas ≤ 1e-08)  
Other points (infeas > 1e-08)  
Dual Bounds
0.00000000 (ANTIGONE)
548143.25580000 (LINDO)
-99999999809999994880.00000000 (SCIP)
References Bracken, Jerome and McCormick, Garth P, Chapter 6. In Bracken, Jerome and McCormick, Garth P, Selected Applications of Nonlinear Programming, John Wiley and Sons, New York, 1968.
Source GAMS Model Library model ship (modified version)
Application Structural Optimization
Added to library 31 Jul 2001
Removed from library 15 Aug 2014
Removed because Objective function is singular (division by variable that can be 0)
Problem type NLP
#Variables 10
#Binary Variables 0
#Integer Variables 0
#Nonlinear Variables 10
#Nonlinear Binary Variables 0
#Nonlinear Integer Variables 0
Objective Sense min
Objective type signomial
Objective curvature indefinite
#Nonzeros in Objective 6
#Nonlinear Nonzeros in Objective 6
#Constraints 16
#Linear Constraints 9
#Quadratic Constraints 1
#Polynomial Constraints 3
#Signomial Constraints 3
#General Nonlinear Constraints 0
Operands in Gen. Nonlin. Functions  
Constraints curvature indefinite
#Nonzeros in Jacobian 46
#Nonlinear Nonzeros in Jacobian 25
#Nonzeros in (Upper-Left) Hessian of Lagrangian 42
#Nonzeros in Diagonal of Hessian of Lagrangian 4
#Blocks in Hessian of Lagrangian 1
Minimal blocksize in Hessian of Lagrangian 10
Maximal blocksize in Hessian of Lagrangian 10
Average blocksize in Hessian of Lagrangian 10.0
#Semicontinuities 0
#Nonlinear Semicontinuities 0
#SOS type 1 0
#SOS type 2 0
Minimal coefficient 3.9000e-03
Maximal coefficient 4.9500e+02
Infeasibility of initial point 407.3

$offlisting
*  
*  Equation counts
*      Total        E        G        L        N        X        C        B
*         17        5       12        0        0        0        0        0
*  
*  Variable counts
*                   x        b        i      s1s      s2s       sc       si
*      Total     cont   binary  integer     sos1     sos2    scont     sint
*         11       11        0        0        0        0        0        0
*  FX      0        0        0        0        0        0        0        0
*  
*  Nonzero counts
*      Total    const       NL      DLL
*         53       22       31        0
*
*  Solve m using NLP minimizing objvar;


Variables  x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,objvar;

Equations  e1,e2,e3,e4,e5,e6,e7,e8,e9,e10,e11,e12,e13,e14,e15,e16,e17;


e1.. -0.5*x9*x4*(0.8*x7 + 0.333333333333333*x8) + x1 =E= 0;

e2.. -0.5*x9*x5*(0.8*x7 + 0.333333333333333*x8) + x2 =E= 0;

e3.. -0.5*x9*x6*(0.8*x7 + 0.333333333333333*x8) + x3 =E= 0;

e4.. sqr(x10 - x7) - (sqr(x8) - sqr(x9)) =E= 0;

e5..    x1 - 8.4652734375*x10 =G= 0;

e6..    x2 - 9.65006510416667*x10 =G= 0;

e7..    x3 - 8.8716796875*x10 =G= 0;

e8.. 0.5*x1*x9 - 2.2*(8.4652734375*x10)**1.33333333333333 =G= 0;

e9.. 0.5*x2*x9 - 2.2*(9.65006510416667*x10)**1.33333333333333 =G= 0;

e10.. 0.5*x3*x9 - 2.2*(8.8716796875*x10)**1.33333333333333 =G= 0;

e11..    x4 - 0.0111771747883801*x7 =G= 0.2;

e12..    x5 - 0.0137655360411427*x7 =G= 0.2;

e13..    x6 - 0.0155663872253648*x7 =G= 0.2;

e14..    x4 - 0.0111771747883801*x8 =G= 0.2;

e15..    x5 - 0.0137655360411427*x8 =G= 0.2;

e16..    x6 - 0.0155663872253648*x8 =G= 0.2;

e17.. -(0.0039*x7 + 0.0039*x8)*(495*x4 + 385*x5 + 315*x6)/x10 + objvar =E= 0;

* set non-default bounds
x4.lo = 1.05;
x5.lo = 1.05;
x6.lo = 1.05;

* set non-default levels
x1.l = 934.032;
x2.l = 934.032;
x3.l = 1011.868;
x4.l = 1.2;
x5.l = 1.2;
x6.l = 1.3;
x7.l = 45.8;
x8.l = 43.2;
x9.l = 30.5;
x10.l = 76.3939536510076;

Model m / all /;

m.limrow=0; m.limcol=0;

$if NOT '%gams.u1%' == '' $include '%gams.u1%'

$if not set NLP $set NLP NLP
Solve m using %NLP% minimizing objvar;


Last updated: 2022-05-24 Git hash: 1198c186
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