Semirings, automata, languages
Semirings, automata, languages
Iteration lemmata for certain classes of word, trace and graph languages
Fundamenta Informaticae
Shuffle languages, Petri nets, and context-sensitive grammars
Communications of the ACM
Shuffle Quotient and Decompositions
DLT '01 Revised Papers from the 5th International Conference on Developments in Language Theory
Algebraic Theory of Automata & Languages
Algebraic Theory of Automata & Languages
The Mathematical Theory of Context-Free Languages
The Mathematical Theory of Context-Free Languages
On Semilinear Sets over Commutative Semirings
Fundamenta Informaticae - Special Issue on Concurrency Specification and Programming (CS&P)
A Hierarchy of Languages with Catenation and Shuffle
Fundamenta Informaticae - Concurrency, Specification and Programming
Properties of Languages with Catenation and Shuffle
Fundamenta Informaticae - Dedicated to the Memory of Professor Manfred Kudlek
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We present basic structures, normal forms, and a hierarchy of languages based on catenation, shuffle and their iterations, defined by algebraic closure or least fix point solution of equation systems.