The MOSEK command line tool Version 7.0 (Revision 141)

The MOSEK command line tool. Version 7.0 ... - Documentation The MOSEK command line tool. Version 7.0 ... - Documentation

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56 CHAPTER 6. THE OPTIMIZERS FOR MIXED-INTEGER PROBLEMS

Chapter 7 The analyzers 7.1 The problem analyzer The problem analyzer prints a detailed survey of the • linear constraints and objective • quadratic constraints • conic constraints • variables of the model. In the initial stages of model formulation the problem analyzer may be used as a quick way of verifying that the model has been built or imported correctly. In later stages it can help revealing special structures within the model that may be used to tune the optimizer’s performance or to identify the causes of numerical difficulties. The problem analyzer is run from the command line using the -anapro argument and produces something similar to the following (this is the problemanalyzer’s survey of the aflow30a problem from the MIPLIB 2003 collection, see Appendix 18 for more examples): Analyzing the problem Constraints Bounds Variables upper bd: 421 ranged : all cont: 421 fixed : 58 bin : 421 ------------------------------------------------------------------------------- Objective, min cx range: min |c|: 0.00000 min |c|>0: 11.0000 max |c|: 500.000 distrib: |c| vars 0 421 57

Chapter 7<br />

<strong>The</strong> analyzers<br />

7.1 <strong>The</strong> problem analyzer<br />

<strong>The</strong> problem analyzer prints a detailed survey of the<br />

• <strong>line</strong>ar constraints and objective<br />

• quadratic constraints<br />

• conic constraints<br />

• variables<br />

of the model.<br />

In the initial stages of model formulation the problem analyzer may be used as a quick way of verifying<br />

that the model has been built or imported correctly. In later stages it can help revealing special<br />

structures within the model that may be used to tune the optimizer’s performance or to identify the<br />

causes of numerical difficulties.<br />

<strong>The</strong> problem analyzer is run from the <strong>command</strong> <strong>line</strong> using the -anapro argument and produces something<br />

similar to the following (this is the problemanalyzer’s survey of the aflow30a problem from the<br />

MIPLIB 2003 collection, see Appendix 18 for more examples):<br />

Analyzing the problem<br />

Constraints Bounds Variables<br />

upper bd: 421 ranged : all cont: 421<br />

fixed : 58 bin : 421<br />

-------------------------------------------------------------------------------<br />

Objective, min cx<br />

range: min |c|: 0.00000 min |c|>0: 11.0000 max |c|: 500.000<br />

distrib: |c| vars<br />

0 421<br />

57

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