Results: **2**

**Formal** Languages and Automata VI:-algebraic systems and transducers

This is the sixth paper of a **series** of papers that will give a survey on several topics on **formal** languages and automata by using semirings, **formal** **power** **series**, matrices andxed point theory. The sixth paper of this **series** deals with the basic results in the theory of !-algebraic systems over quemirings generalizing the classical context-free grammars generating languages overnite and innite words. ...

**Formal** Languages and Automata V: Conway Semiring-Semimodule Pairs and Finite Automata

This is the fth paper of a **series** of papers that will give a survey on several topics on **formal** languages and automata by using semirings, **formal** **power** **series**, matrices and xed point theory. The fth paper of this **series** deals with the basic results in the theory of nite automata over quemirings generalizing the classical nite automata accepting nite and innite words. The presentation of these results ...