I am having trouble understanding one line of the proof for a claim that involves degeneracy in the simplex method, all of which are posted below. Idicated by the red arrow is the step that troubles me: "also ".
I have also written my thoughts below.
Thank you very much!
I know the following from the given fact that the objective value doesn't change after one application of the simplex method:
, since . However, how does the step in red follow from this?
Actual Question and Proof: