The CLA conference is an international forum for researchers, practitioners and students dedicated to the practice of Formal Concept Analysis (FCA) and areas closely related to it, including data analysis and mining, information retrieval, knowledge management, knowledge engineering, logic, algebra and lattice theory. Unfortunately the COVID-19 pandemic broke out early this year and we had to move to a virtual conference without the chances to carry out face-to-face interchange of ideas as the CLA community was wont to do in previous events. We are sure all virtual attendants will raise to the occasion and develop new manners of interaction so new ideas and techniques may arise. CLA 2020 received 35 submissions out of which 21 were accepted as full papers and 2 as short papers. Two invited plenary speakers were also gracious enough to submit shortened summaries of their talks, despite the fact that they would not get the physical perks of attending the conference as honored guests! This volume includes all of these contributions. In these troubled times, we would like to thank all authors and speakers for the extra e ort to provided high quality contributions, and program committee members and external reviewers for their careful and timely review of submissions. We would also like to thank the CLA steering committee for the chance they gave us to contribute to the fostering of FCA and related areas. And special thanks go to the local committee who will make it possible for these proceedings to be published despite the fact that they will not be able to take pride in hosting the physical conference this year. We are all in your debt. We would also like to thank the EasyChair conference organizing system for making much easier all tasks in the conference organizing work ow. We hope to virtually meet you at CLA 2020 this year. Paraphrasing F. Herbert, \the lattice must ow!"
CLA 2020 was organized by Tallinn University of Technology.
Francisco J. Valverde-Albacete Universidad Carlos III de Madrid, Spain Martin Trnecka Palacky University Olomouc, Czech Republic
Sadok Ben Yahia Jean Diatta Peter Eklund Sergei O. Kuznetsov
Alexandre Bazin Sadok Ben Yahia Radim Belohlavek Karell Bertet Francois Brucker Ana Burusco Aleksey Buzmakov
Palacky University Olomouc, Czech Republic Tallinn University of Technology, Estonia Universite de la Reunion, France IT University of Copenhagen, Denmark National Research University Higher School of Economics, Moscow, Russia LIMOS, CNRS UMR 6158, University Blaise Pascal, Clermont-Ferrand, France INRIA NGE/LORIA, Nancy, France Universidad de Malaga, Spain Palacky University Olomouc, Czech Republic ICube, Universite de Strasbourg/ENGEES, Strasbourg, France Akita International University, Japan CNRS, Paris, France Universite de Rennes 1, France LITA, Universite Lorraine, Metz, France Universite du Quebec a Montreal, Canada National Research University Higher School of Economics, Russia LIRIS - INSA de Lyon, France P. J. Safarik University, Slovak Republic Technische Universitat Dresden, Germany Palacky University, Olomouc, Czech Republic Palacky University, Olomouc, Czech Republic Warsaw University of Technology, Poland Bern University of Applied Sciences, Switzerland ICube, Universite de Strasbourg/ENGEES, Strasbourg, France Universite du Quebec en Outaouais, LARIM, Canada University of Cadiz, Spain LIMOS { Blaise Pascal University { CNRS, France LORIA Nancy, France National Research University Higher School of Economics, Russia Dept. of Applied Mathematics, University of Malaga, Spain Palacky University in Olomouc, Czech Republic Palacky University, Olomouc, Czech Republic Universite de Lyon, INSA Lyon, France Ostfalia University, Germany LIMOS { Blaise Pascal University { CNRS, France Department of Analysis, University of Miskolc, Hungary GREYC CNRS UMR6072 { Universite de Caen, France CNRS, France Technische Universitat Dresden, Germany Babes-Bolyai University, Romania Frankfurt University of Applied Sciences, Germany University of Kassel, Germany University of Debrecen, Hungary University of Novi Sad, Serbia Universite du Quebec A Montreal, Canada Stellenbosch University, South Africa University of Regina, Canada
Sadok Ben Yahia Ecole Normale Superieure, Yaounde, Cameroon Tallinn University of Technology, Estonia