Opened 11 years ago

Closed 8 months ago

#23 closed defect (migrated)

Incorrect solution to quadratic programme

Reported by: ruminator Owned by: forrest
Priority: major Milestone:
Component: component1 Version:
Keywords: Cc:

Description

The attached MPS file contains a small problem that has the ability to confuse CLP, whereas I would expect the solution to be around 1.713e15 I have observed values in the range of 2.484e15 without presolve and 5.076e15 with. Barrier will yield results of the order of 1023.

Attachments (1)

degenerate.mps (1.1 KB) - added by ruminator 11 years ago.
MPS file describing the programme

Download all attachments as: .zip

Change History (4)

Changed 11 years ago by ruminator

MPS file describing the programme

comment:1 Changed 11 years ago by ruminator

Might also add that the objective is positive semidefinite

comment:2 Changed 10 years ago by forrest

  • Owner changed from somebody to forrest
  • Status changed from new to assigned

Matrix should only have one copy of off diagonal elements. Still gives problems but I can get 1.71323e15

comment:3 Changed 8 months ago by stefan

  • Resolution set to migrated
  • Status changed from assigned to closed

This ticket has been migrated to GitHub and will be resolved there: https://github.com/coin-or/Clp/issues/23

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