*** MESSAGE REFERS TO PREVIOUS VERSION *** added declared_tyname/const and read_tyname/const; removed certify_tyname/const; added prep_ext_merge, nontriv_merge kept internal; efficient subsig test;
*** MESSAGE REFERS TO PREVIOUS VERSION ***
added declared_tyname/const and read_tyname/const;
removed certify_tyname/const;
added prep_ext_merge, nontriv_merge kept internal;
efficient subsig test;

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