Descriptional Complexity of Formal Systems [electronic resource] : 17th International Workshop, DCFS 2015, Waterloo, ON, Canada, June 25-27, 2015. Proceedings / edited by Jeffrey Shallit, Alexander Okhotin.

Invited Talks -- Regular Functions -- Unambiguity in Automata Theory -- Contributed Papers -- Partial Derivative Automaton for Regular Expressions with Shue -- Upper Bound on Syntactic Complexity of Suffix-Free Languages -- Nondeterministic Tree Width of Regular Languages -- Integer Complexity: Experimental and Analytical Results II -- Square on ideal, closed and free languages -- A Tentative Approach for the Wadge-Wagner Hierarchy of Regular Tree Languages of Index [0,2] -- Compressibility of finite languages by grammars -- On the Complexity and Decidability of Some Problems Involving Shue -- On the Computational Complexity of Problems Related to Distinguishability Sets -- Prefix-Free Subsets of Regular Languages and Descriptional Complexity -- Transducer Descriptions of DNA Code Properties and Undecidability of Antimorphic Problems -- On Simulation Costs of Unary Limited Automata -- On some decision problems for stateless deterministic ordered restarting Automata -- Quantum queries on permutations -- Complement on Free and Ideal Languages -- Universal Disjunctive Concatenation and Star -- Quasi-Distances and Weighted Finite Automata -- The State Complexity of Permutations on Finite Languages Over Binary Alphabets -- Star-Complement-Star on Prefix-Free Languages -- Groups whose word problem is a Petri net language -- Regular realizability problems and context-free languages -- Generalization of the Double-Reversal Method of Finding a Canonical Residual Finite State Automaton -- Quantum State Complexity of Formal Languages.