Post subproblem solution(s) corresponding to a column of coefficients for a new master problem variable to the colgen instance ColgenInstance. The argument must be a sp_sol structure or list of such structures:
sp_sol(cost, coeff_vars, aux)
where cost is the master problem cost function coefficient
of the solution, coeff_vars is a list of Id-Val
pairs corresponding to the subproblem variable solution values and
identifier of the constraint in which it occurred as an implicit sum
term for those subproblem variables with a non-zero solution
value. aux should contain any problem specific information
which is of interest that is not represented uniquely by the cost
and objective coefficients.