The semidefinite programming CSDP solver from COIN-OR. The communication with CSDP requires the setup of matrix data structures in a CSDP input file. In a sense a GAMS model functions as a matrix generator.
csdp <input problem> [<final solution>] [<initial solution>]
the name of a file containing the SDP problem in SDPA sparse format.
the optional name of a file in which to save the final solution.
the optional name of a file from which to tak the initial solution.
See CSDP User's Guide for more information.