Initializing help system before first use

QSIMPLEXOPS

Description
Controls the behavior of the quadratic simplex solvers via a bit-vector (see Section Bit-vector controls).
Type
Integer
Topic areas
Quadratic, Simplex, Bit-vector
Values
Bit
Meaning
0 
Force traditional primal first phase.
1 
Force BigM primal first phase.
2 
Force traditional dual first phase.
3 
Force BigM dual first phase.
4 
Always use artificial bounds in dual.
5 
Use original problem basis only when warmstarting the KKT.
6 
Skip the primal bound flips for ranged primals (might cause more trouble than good if the bounds are very large).
7 
Also do the single pivot crash.
8 
Do not apply aggressive perturbation in dual.
9 
Applies standard scaling to the KKT system.
10 
Do not fall back to using Barrier in case of numerical difficulties with quadratic simplex during a MIP solve.
11 
Use primal simplex to solve the phase 1 feasibility problem before applying quadratic primal simplex.
12 
Use dual simplex to solve the phase 1 feasibility problem before applying quadratic primal simplex.
13 
Use barrier algorithm to solve the phase 1 feasibility problem before applying quadratic primal simplex.
14 
Use partial pricing.
15 
Use full pricing.
16 
Perform cleanup if a superbasic solution is provided for warm-start.
Default value
0
Affects routines
XPRSlpoptimize ( LPOPTIMIZE), XPRSmipoptimize ( MIPOPTIMIZE).
Category
Control

Parent Topic Control Parameters

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