Descriptional Complexity of Formal Systems, 1st ed. 2021 23rd IFIP WG 1.02 International Conference, DCFS 2021, Virtual Event, September 5, 2021, Proceedings Theoretical Computer Science and General Issues Series

The 16 full papers presented in this volume were carefully reviewed and selected from 21 submissions. The conference focus to all aspects of descriptional complexity-the costs of description of objects in various computational models such as Turing machines, pushdown automata, finite automata or grammars.

Complexity issues for the iterated h-preorders.- On the Uniform Distribution of Regular Expressions.- Deterministic one-way simulation of two-way deterministic finite automata over small alphabets.- Sync-Maximal Permutation Groups Equal Primitive Permutation Groups.- Commutative Regular Languages with Product-Form Minimal Automata.- State Complexity Bounds for Upward and Downward Closures on Commutative Languages and Commutative Group and Commutative Aperiodic Languages.- More on the Descriptional Complexity of Compositions of Finite Automata.- Width Measures of Alternating Finite Automata.- Partial Derivative Automaton by Compressing Regular Expressions.- State Complexity of Partial Word Finite Automata.- State complexity of union and intersection on graph-walking automata.- Gray cycles of maximum length related to $k$-character substitutions.- Automata Equipped with Auxiliary Data Structures and Regular Realizability Problems.- Disambiguation of Weighted Tree Automata.- Image-Binary Automata.- Improved constructions for succinct affine automata.