1289181995 Source: opm2.tar File: upload/08.11.2010_1289181995_Daniel_Espinoza/opm2.tar Name: Daniel_Espinoza Company: Universidad de Chile eMail: daespino@gmail.com Street: Av. Republica 701 City: Santiago Country: Chile Message: Problems coming from precedence constrained knapsacks arising in mining applications. These are one-period problems with integer data but large root LP GAP delivered on: 08.11.2010