[OS-tickets] [Optimization Services] #11: OS/Ipopt gives wrong sign on constraint dual values

[Optimization Services]

#11: OS/Ipopt gives wrong sign on constraint dual values
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 Reporter:  stefan      |       Owner:  somebody
     Type:  defect      |      Status:  new     
 Priority:  major       |   Milestone:          
Component:  component1  |     Version:          
 Keywords:              |  
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 Hi,

 the sign of the dual values returned from the OS interface to Ipopt is
 flipped compared to those from Cbc, for example.

 Note that the point lambda given in finalize_solution need to be negated.

 I used OS/stable/2.0

 Stefan

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Ticket URL: <https://projects.coin-or.org/OS/ticket/11>
Optimization Services <http://projects.coin-or.org/OS>
An interface for Web services implementing optimization.