[Help-glpk] SOS2 piecewise linear function example

[Harley]

I was just reading the SOS2 constraints in GLPK for modeling piecewise linear functions and I wanted 
to check that I have understood the model so I have created an example formulation in GLPK mathprog 
and added it to the wikibook:

  http://en.wikibooks.org/wiki/GLPK/Modeling_tips

The model calculates the pool price from actual published price sensitivities in the Australian 
National Electricity Market for the QLD region.

Could someone please review and let me know if there are any problems and feel 
free to improve anything.

Regards,

Harley

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