http://www.univ-perp.fr/see/rch/lts/marty/lattices/syntax.rtf
in addition to http://www.univ-perp.fr/see/rch/lts/marty/lattices/Lattice-CP.rtf Robert Marty http://robert.marty.perso.cegetel.net/ --- Message from peirce-l forum to subscriber archive@mail-archive.com