Dahmane Achour, Med-Boudiaf University-M'sila, Algeria María D. Acosta, University of Granada, Spain Barış Akay, Istanbul University, Turkey Javid Ali, Aligarh Muslim University, Aligarh, India Ahlem Alouani, University of M'sila, Algeria Irina Asekritova, Linköping University, Sweden Mojtaba Bakherad, University of Sistan and Baluchestan, Zahedan, Iran Ozlem Baksi, Yildiz Technical University, Turkey Sudeshna Basu, George Washington University, United States Deepika Baweja, Indian institute of Technology Kanpur, India Richard Becker, University Paris VI, France Abdullah Bin Abu Baker, IIIT Allahabad, India Adam Bohonos, West Pomeranian University of Technology, Poland Santiago Boza Rocho, Universitat Politècnica de Catalunya, Spain Yuri Brudnyi, Technion – Israel Institute of Technology, Israel Alexander Brudnyi, University of Calgary, Canada Michał Brzozowski, University of Warsaw, Poland Maciej Burnecki, Wrocław University of Science and Technology, Poland María Carro, University of Barcelona, Spain Jesus M. F. Castillo, Universidad de Extremadura, Spain Tadeusz Chawziuk, Adam Mickiewicz University in Poznań, Poland Chung-Chuan Chen, National Taichung University of Education, Taiwan Qingjin Cheng, Xiamen University, China Grażyna Ciecierska, University of Warmia and Mazury in Olsztyn, Poland Maciej Ciesielski, Poznań University of Technology, Poland Fernando Cobos, Complutense University of Madrid, Spain Michael Cwikel, Technion-Israel Institute of Technology, Israel Elhadj Dahia, Med Boudiaf University-M'sila, Algeria Andreas Defant, University of Oldenburg, Germany Alicja Dota, Poznan University of Technology, Poland Kimberly Duran, University of Illinois at Urbana-Champaign, United States Aldona Dutkiewicz, Adam Mickiewicz University in Poznań, Poland Nasrin Eghbali, University of Mohaghegh Ardabili, Iran Afshin Erami, Marvdasht Branch, Islamic Azad University, Iran Ezgi Erdoğan, Marmara University, Turkey Pedro Fernández-Martínez, University of Murcia, Spain Xiao-Xiong Gan, Morgan State University, United States Joanna Garbulińska-Węgrzyn, Jan Kochanowski University, Poland Luis García-Lirola, University of Murcia, Spain Omer Gok, Yildiz Technical University, Turkey Anna Golińska, Adam Mickiewicz University in Poznań, Poland Michał Goliński, Adam Mickiewicz University, Poland Loukas Grafakos, University of Missouri, United States Karl Grosse-Erdmann, University of Mons, Belgium Rainis Haller, University of Tartu, Estonia Dorothee Haroske, Friedrich Schiller University Jena, Germany Henryk Hudzik, Adam Mickiewicz University in Poznań, Poland Héctor Jardón Sánchez, University of Oviedo, Spain Michał Jasiczak, Adam Mickiewicz University, Poland Radosław Kaczmarek, Adam Mickiewicz University in Poznań, Poland Thanatkrit Kaewtem, University of Bristol, United Kingdom Anna Kamińska, The University of Memphis, United States Oleksiy Karlovych, Universidade Nova de Lisboa, Portugal Piotr Kasprzak, Adam Mickiewicz University in Poznań, Poland Mikio Kato, Kyushu Institute of Technology, Japan Cansu Keskin, Dumlupınar University, Turkey Ayşegül Keten, Necmettin Erbakan University, Turkey Lee KeunYoung, Sejong University, Korea Republic of (South Korea) Eder Kikianty, University of Pretoria, South Africa Beth Kiratu, The Technical University of Kenya, Kenya Vakhtang Kokilashvili, A. Razmadze Mathematical Institute of TSU, Georgia Paweł Kolwicz, Poznań University of Technology, Poland Joanna Kończak, Adam Mickiewicz University in Poznań, Poland Joanna Kowalska, Adam Mickiewicz University in Poznań, Poland Natan Kruglyak, Linköping University, Sweden Karsten Kruse, Hamburg University of Technology, Germany Damian Kubiak, Tennessee Technological University, United States Albert Kubzdela, Poznan University of Technology, Poland Mezrag Lahcene, University Mohamed Boudiaf M'sila, Algeria Michael Langenbruch, University of Oldenburg, Germany Włodzimierz Laskowski, West Pomeranian University of Technology Szczecin, Poland Richard Lechner, Johannes Kepler University Linz, Austria Han Ju Lee, Dongguk Univeristy, Korea Republic of (South Korea) Krzysztof Leśniewski, Warsaw University of Technology, Poland Karol Leśnik, Poznań University of Technology, Poland Grzegorz Lewicki, Jagiellonian University, Poland Nisar Lone, University of Kashmir, India Haifeng Ma, Harbin Normal University, China Manuel Maestre, University of Valencia, Spain Lech Maligranda, Luleå University of Technology, Sweden Neha Malik, Netaji Subhas Institute of Technology, New Delhi, India Antonio Manzano, University of Burgos, Spain Mieczysław Mastyło, Adam Mickiewicz University, Poznań, Poland Katsuo Matsuoka, Nihon University, Japan Fernando Mayoral, University of Seville, Spain Alexander Meskhi, A. Razmadze Mathematical Institute of TSU, Georgia Artur Michalak, A. Mickiewicz University in Poznań, Poland Paweł Mleczko, Adam Mickiewicz University in Poznań, Poland Rihhard Nadel, University of Tartu, Estonia Marek Nawrocki, Adam Mickiewicz University in Poznań, Poland Per Nilsson, not affiliated to an academic institution, Sweden Wiktoria Olechnowicz, Adam Mickiewicz University in Poznań, Poland Walter Andrés Ortiz Vargas, Autonomous University of Barcelona, Spain Carlos Pérez, University of the Basque Country, BCAM and Ikrebasque, Spain Antonio Pérez Hernández, University of Murcia, Spain Katriin Pirk, University of Tartu, Estonia Ryszard Płuciennik, Poznan University of Technology, Poland Adam Przestacki, Adam Mickiewicz University, Poznań, Poland Matias Raja, University of Murcia, Spain Mateusz Rapicki, University of Warsaw, Poland Yves Raynaud, CNRS, France Mangatiana Robdera, University Botswana, Botswana Hadi Roopaei, Vali-e-Asr university of Rafsanjan, Iran Pilar Rueda, University of Valencia, Spain Michał Rzeczkowski, Adam Mickiewicz University, Poznań, Poland Maciej Rzeszut, Polish Academy of Sciences, Institute of Mathematics, Poland Yeşim Sağlam Özkan, Uludag University, Art and Science Faculty, Turkey Enrique A. Sanchez Perez, Polytechnical University of Valencia, Spain Yoshihirio Sawano, Tokyo Metropolitan University, Japan Sunke Schlüters, Carl-von-Ossietzky University Oldenburg, Germany Ingo Schoolmann, Carl von Ossietzky University Oldenburg, Germany Ali Shukur, Belarusian State University, Belarus Eduardo Silva, Maringa State University, Brazil Rajesh Kumar Singh, Indian Institute of Technology Kanpur, India Gord Sinnamon, The University of Western Ontario, Canada Leszek Skrzypczak, Adam Mickiewicz University, Poznań, Poland Andrzej Sołtysiak, Adam Mickiewicz University in Poznań, Poland Jiří Spurný, Charles University, Czech Republic Bartosz Staniów, Adam Mickiewicz University in Poznań, Poland Krzysztof Stempak, Wroclaw University of Science and Technology, Poland Tomasz Stroiński, Adam Mickiewicz University in Poznań, Poland Fedor Sukochev, University of New South Wales, Australia Radosław Szwedek, Adam Mickiewicz University in Poznań, Poland Hyung-Joon Tag, University of Memphis, United States Abdelhamid Tallab, Med Boudiaf University-m'sila, Algeria Bernadeta Tomasz, Adam Mickiewicz University in Poznań, Poland Yukino Tomizawa, Niigata Institute of Technology, Japan Maria Trybuła, Adam Mickiewicz University in Poznań, Poland Tugce Unver Yildiz, Kirikkale University, Turkey Alexandr Usachev, Chalmers University of Technology/University of Gothenburg, Sweden Dirk Werner, Free University Berlin, Germany Marek Wisła, Adam Mickiewicz University in Poznań, Poland Witold Wnuk, Adam Mickiewicz University in Poznań, Poland Michał Wojciechowski, Polish Academy of Sciences, Poland Damla Yaman, Yildiz Technical University, Turkey Henri Ylinen, University of Jyväskylä, Finland Zihou Zhang, Shanghai University of Engineering Science, China Wen Zhang, School of Mathematical Science, Xiamen University, China Yu Zhou, Shanghai University of Engineering Science, China