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A Library of Quadratic Programming Instances

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QPLIB_1675

Formats	gms lp mod qplib
Problem type ^probtype	QCQ
Solution point objective value ^solobjvalue	-75.66868248 (gdx, sol)
Solution point infeasibility ^{solinfeasibility}	6.7110e-11
Donor ^donor	Nick Sahinidis
#Variables ^nvars	60
#Binary Variables ^nbinvars	0
#Integer Variables ^nintvars	0
#Bounded non-binary Variables ^nboundedvars	60
#Variables with only one bound ^{nsingleboundedvars}	0
#Nonlinear Variables ^nnlvars	60
#Nonlinear Binary Variables ^nnlbinvars	0
#Nonlinear Integer Variables ^nnlintvars	0
Objective Sense ^objsense	min
Objective type ^objtype	quadratic
Objective curvature ^objcurvature	indefinite
#Negative eigenvalues in objective matrix ^{nobjquadnegev}	31
#Positive eigenvalues in objective matrix ^{nobjquadposev}	29
#Nonzeros in Objective ^nobjnz	60
#Nonlinear Nonzeros in Objective ^nobjnlnz	60
#Quadratic Terms in Objective ^nobjquadnz	896
#Square Terms in Objective ^{nobjquaddiagnz}	36
#Constraints ^ncons	13
#Linear Constraints ^nlincons	12
#Quadratic Constraints ^nquadcons	1
#Diagonal Quadratic Constraints ^{ndiagquadcons}	0
Constraints curvature ^{conscurvature}	indefinite
#Convex Nonlinear Constraints ^{nconvexnlcons}	0
#Concave Nonlinear Constraints ^{nconcavenlcons}	0
#Indefinite Nonlinear Constraints ^{nindefinitenlcons}	1
#Nonzeros in Jacobian ^njacobiannz	776
#Nonlinear Nonzeros in Jacobian ^{njacobiannlnz}	60
#Nonzeros in (Upper-Left) Hessian of Lagrangian ^{nlaghessiannz}	2640
#Nonzeros in Diagonal of Hessian of Lagrangian ^{nlaghessiandiagnz}	48
#Blocks in Hessian of Lagrangian ^{nlaghessianblocks}	1
Minimal blocksize in Hessian of Lagrangian ^{laghessianminblocksize}	60
Maximal blocksize in Hessian of Lagrangian ^{laghessianmaxblocksize}	60
Average blocksize in Hessian of Lagrangian ^{laghessianavgblocksize}	60.0
Sparsity Jacobian
Sparsity Lag. Hessian