User blog comment:Deedlit11/Ordinal Notations V: Up to a weakly Mahlo cardinal/@comment-24509095-20140509071457/@comment-24509095-20140509151203

Ikosarakt: That makes sense. But what about $$\psi_{\chi(M)}$$ and $$\psi_{\chi(M)_2}$$?

Peng: No, I meant that I didn't really understand the statement. :P