User blog comment:Edwin Shade/How Do I Evaluate BEAF Arrays In Two Dimensions ?/@comment-30754445-20170827183955/@comment-28606698-20170830224634

Somewhere I have read that set of finite ordinals and set of  countable ordinals are two not intersecting sets  in other words countable ordinals are infinite ordinals less than the first uncountable ordinal. Anyway countable ordinals are ordinals whose cofinality either 1 either omega.