BARSTART

-1 

Uses the available solution for warm-start.

0 

Determine automatically.

1 

Uses simple heuristics to compute the starting point based on the magnitudes of the matrix entries.

2 

Uses the pseudoinverse of the constraint matrix to determine primal and dual initial solutions. Less sensitive to scaling and numerically more robust, but in several case less efficient than 1.

3 

Uses the unit starting point for the homogeneous self-dual barrier algorithm.