alpha_for_y:

Method to determine the step size for constraint multipliers. $\;$
This option determines how the step size (alpha_y) will be calculated when updating the constraint multipliers. The default value for this string option is "primal".
Possible values:

• primal: use primal step size
• bound-mult: use step size for the bound multipliers (good for LPs)
• min: use the min of primal and bound multipliers
• max: use the max of primal and bound multipliers
• full: take a full step of size one
• min-dual-infeas: choose step size minimizing new dual infeasibility
• safer-min-dual-infeas: like "min_dual_infeas", but safeguarded by "min" and "max"
• primal-and-full: use the primal step size, and full step if delta_x <= alpha_for_y_tol
• dual-and-full: use the dual step size, and full step if delta_x <= alpha_for_y_tol
• acceptor: Call LSAcceptor to get step size for y