User blog comment:Alemagno12/BM2 has a problem/@comment-30754445-20180724073311/@comment-25601061-20180724171819

He means to make a formal proof (not just a table of ordinals) that (0,0)(1,1)(2,2) = BHO. This can be done by proving that each standard BM2 expression below (0,0)(1,1)(2,2) corresponds to an ordinal below the BHO.