cardinal_UN_Ord_lt_csucc: added comment le_UN_Ord_lt_csucc: tided proof by proving the lemma inj_UN_subset
cardinal_UN_Ord_lt_csucc: added comment
le_UN_Ord_lt_csucc: tided proof by proving the lemma
inj_UN_subset

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle