This article provides an informal introduction to several core ideas. For a more complete account see information theory. Semiotic information theory considers the information content of signs and expressions as it is conceived within the semiotic or sign-relational framework developed by Charles Sanders Peirce. Once over...

In semiotics, a sign relational complex is a generalization of a sign relation that allows for empty components in the elementary sign relations, or sign relational triples of the form (object, sign, interpretant). Generally speaking, when it comes to things that are being contemplated as ostensible or potential signs of other things, neither the existence nor the uniqueness of...

This article develops the theory of relations in regard to its specifically combinatorial aspects. For a general discussion of the basic definitions, see the articles on binary relations and relations_in_mathematics. Relations fall into various types according to their specific properties, often as expressed in the axioms or...