Preface: 11th Workshop on Non-classical Models of Automata and Applications (NCMA 2019)

Many non-classical automata models are natural objects of theoretical computer science. They are studied from different points of view in various areas, both as theoretical concepts and as formal models for applications. The aim of the NCMA workshop series is to bring together researchers working on different aspects of different variants of non-classical automata models in order to exchange and develop novel ideas. A deeper and interdisciplinary coverage of this particular area may gain new insights and substantial progress. This special issue of RAIRO-ITA contains six contributions reported at the 11th International Workshop on Non-Classical Models of Automata and Applications (NCMA 2019) that took place in Valencia (Spain) on 2nd and 3rd July 2019, organized by the Research Group on Formal Automata and their Applications of the VRAIN institute of the Universitat Politècnica de València. The first workshop, NCMA 2009, was held in Wroclaw, Poland, in 2009 as a satellite event of FCT 2009, sponsored by the AutoMathA project of the European Science Foundation (ESF). The second workshop, NCMA 2010, was held in Jena, Germany, as an associated workshop of the Conference on Membrane Computing (CMC 2010). Since 2011, the NCMA workshops have been organized as stand-alone events, NCMA 2011 in Milan, Italy, NCMA 2012 in Fribourg, Switzerland, NCMA 2013 in Ume̊a, Sweden, NCMA 2014 in Kassel, NCMA 2015 in Porto, Portugal, NCMA 2016 in Debrecen, Hungary, NCMA 2017 in Prague, Czech Republic, and NCMA 2018 in Košice, Slovakia. During the NCMA 2019, 11 full contributions and three short contributions were accepted and presented. In addition, there were two invited talks given by Prof. Dr. Victor Mitrana (Univ. Politécnica de Madrid) and Dr. Agust́ın Riscos-Núñez (Univ. de Sevilla). The works presented at the workshop were selected and reviewed by the members of the Program Committee. We thank the members of the Program Committee for their excellent work: José M. Sempere (Universitat Politècnica de València, Valencia, Spain) Markus Holzer (University of Giessen, Germany), Erzsébet Csuhaj-Varjú (Eötvös Loránd University, Budapest, Hungary), Henning Fernau (Trier University, Germany), Bruno Guillon (INRIA Lille, France), Galina Jirásková (Slovak Academy of Sciences, Slovakia), Lila Kari (University of Waterloo, Canada), Zbyněk Křivka (Brno University of Technology, Czech Republic), Alberto Leporati (Università degli Studi di Milano – Bicocca, Italy), Andreas Malcher (University of Giessen, Germany), Brink van der Merve (University of Stellenbosch, South Africa), Benedek Nagy (Eastern Mediterranean University, Famagusta, North Cyprus), Friedrich Otto (University of Kassel, Germany), Cem Say (Boǧazici University of Istanbul, Turkey), Petr Sośık (Silesian University, Opava, Czech Republic), Bianca