User blog comment:Deedlit11/Ordinal Notations V: Up to a weakly Mahlo cardinal/@comment-30004975-20171217042147/@comment-30754445-20171217060759

Of-course it has fixed points.

For example, ɪM = M (if this weren't the case, then we couldn't have used M for extanding our notation). And there are smaller fixed points for ɪx, just like I isn't the the smallest fixed point of Ωx

Of-course, just like ɪω isn't the limit of ɪ₁, ɪ₂, ɪ₃... the first fixed point of ɪx is not the limit of ɪ, ɪɪ, ɪɪ ɪ, etc.

(and here too, I have absolutely no idea how the cardinal ɪɪ ɪ ⋱ would be notated in Deedlit's system)