Abstract Peirce's classes of signs have given rise to a large number of approaches aimed at exposing them, illustrating them, modeling them, formalizing them in different terms, and in some cases testing their operationality. Among these approaches one can distinguish and characterize "iconographic models". Four of them are studied. They are certainly known to most peirceans: the "tripods" of Floy Merrell, the "trikonics" of Gary Richmond, the "cornered signs" of Priscila Farias and Joao Queiroz which are derived from drawings of Peirce's hand himself (named so for convenience), the "signtrees" of Priscila Borges. We demonstrate that they are all isomorphic to the classes of signs obtained by algebraical method, and therefore isomorphic each other. But this algebraic model also shows that the set of 10 classes of signs is organized in a lattice structure, which is a natural extension of the Peircean theory of signs. Peirce, by defining "affinities" between sign classes, had intuited the existence of this algebraic structure but it was not yet available as such at his time. Relative to the state in which Peirce left us his semiotics, this model is, so to speak, "epistemologically pure".
https://www.academia.edu/s/e2ce02d520 Honorary Professor ; PhD Mathematics ; PhD Philosophy fr.wikipedia.org/wiki/Robert_Marty de.wikipedia.org/wiki/Robert_Fran%C3%A7ois_Raymond_Marty <https://de.wikipedia.org/wiki/Robert_Fran%C3%A7ois_Raymond_Marty?fbclid=IwAR0N4S-t_avO38YlBYcj_-a2YYcsNvl6joIhTkajX0lMQhV8CXRQjQeXXxQ>
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