Let x and y be given.
Assume Hx Hy.
Let n be given.
Assume Hn.
Assume Hxy.
Apply SNoLt_tra x y (y + eps_ n) Hx Hy (SNo_add_SNo y (eps_ n) Hy (SNo_eps_ n Hn)) Hxy to the current goal.
We will prove y < y + eps_ n.
An exact proof term for the current goal is add_SNo_eps_Lt y Hy n Hn.