[Symphony] (file) format for bi-objective problems

[Sebastian Schenker]

Dear all,

on https://projects.coin-or.org/SYMPHONY it is written that Symphony can 
be used to solve bi-objective MILPs. In the FAQ it is mentioned that it 
"will read AMPL/GMPL files using GLPKs parser, or MPS file using 
COIN-OR's parser".

How does Symphony read bi-objective problems? Do you use an extended 
file format?
I am not aware that AMPL and MPS (directly) supports several criteria.

best,
Sebastian

-- 
Sebastian Schenker
Research Assistant

Zuse Institute Berlin
Department of Mathematical Optimization
Tel.: +49 (0)30 84185-223
Email: schenker at zib.de

TU Berlin, Institute of Mathematics
Combinatorial Optimization & Graph Algorithms group
Tel.: +49 (0)30 314-78657
Email: schenker at math.tu-berlin.de