These files are compressed with the MPC utility and need to be uncompressed with EMPS to be converted to MPS format.
Both utilities are available at http://www.netlib.org/lp/data/ BZIP2 for Windows is at: http://gnuwin32.sourceforge.net/packages/bzip2.htm
Questions about the origins of these LPs were posed repeatedly. To the best of our knowledge we will list sources here (to be continued):
RAIL: set covering problems from the Italian railroad, see http://people.brunel.ac.uk/~mastjjb/jeb/orlib/scpinfo.html
NUG: computing LP loweer bounds for quadratic assignment problems. see; S.E. KARISCH and F. RENDL. Lower bounds for the quadratic assignment problem via triangle decompositions. Mathematical Programming, 71(2):137-152, 1995 K.G. Ramakrishnan, M.G.C. Resende, B. Ramachandran, and J.F. Pekny, "Tight QAP bounds via linear programming," Combinatorial and Global Optimization, P.M. Pardalos, A. Migdalas, and R.E. Burkard, eds., World Scientific Publishing Co., Singapore, pp. 297-303, 2002.
PDS: Patient distribution (evacuation) system. see W. Carolan, J. Hill, J. Kennington, S. Niemi, and S. Wichmann, "An Empirical Evaluation of the KORBX Algorithms for Military Airlift Applications," Operations Research, 38, (1990), 240-248.
MISC: All files named neos* or ns* are from submissions to one of our NEOS solvers and we do not know more about their origin. The files cont* are linearized versions of some of our PDE-constrained optimization problems give in AMPL format on http://plato.asu.edu/pdecon.html The files sgpf5y, stormG2_1000, and watson_* are from stochastic LPs. They are the deterministic equivalents of some of the problems in one of the stochastic LP repositories listed in that category on our webpage. spal_004 was sent to us by [email protected] from a research project.
NETWORK: These problems were provided by Bo Jensen ([email protected])
FCTP: Fixed-charge transportation problems. See README in that directory Hans Mittelmann ([email protected])