User blog comment:Tetramur/BEAF above SVO - comparison/@comment-5150073-20200219121934/@comment-37993808-20200219133019

> BEAF is fully formalized and well-defined (currently until SVO). So, I said that BEAF is fully formalized to SVO (that is, to lineational arrays of kind {X,X,1,1,2}&3) but no further. I can explain the whole system of formalizing, but this was done by Saibian (I gave link in part 1) until linear array-arrays. So, the first array that left unformalized by Saibian is {X,X,1,2}&n, which corresponds to Ackermann's ordinal. Cookiefonster mentions the system of formalising BEAF to SVO but he didn't write it explicitly.