Rizos Sklinos, Einstein Institute of Mathematics, Hebrew University of Jerusalem, Jerusalem Youssef EL FROM, Mathématiques, FSSM, Université Cadi Ayyad, Marrakech Ahmed Elsawy, Mathematisches Institut , Heinrich-Heine-Universität Düsseldorf, Düsseldorf Tara Davis, Math, Hawaii Pacific University, Honolulu Boaz Tsaban, Mathematics, Bar-Ilan University, Ramat Gan Margarita Amchislavska, Mathematics Department, Cornell University, Ithaca Simon Blackburn, Mathematics, Royal Holloway, University of London, Egham, Surrey Murray Elder, Mathematical and Physical Sciences, The University of Newcastle, Callaghan Vahagn Mikaelian, Department of Informatics and Applied Mathematics, Yerevan State University, Yerevan Imran Muhammad, Centre for Advanced Mathematics and Physics, National University of Sciences and Technology, Islamabad, Islamabad Denis Lurye, superior algebra, Moscow State University, Moscow Marius Buliga, Institute of Mathematics (IMAR), Romanian Academy, Bucharest Francesco Russo, DIEETCAM, University of Palermo, Palermo Elizaveta Frenkel, Faculty of further education, Moscow State University, Moscow Alexander Zakharov, Department of Mathematics and Mechanics, Moscow State University, Moscow Ayala Byron, Mathematics, Hebrew University, Jerusalem Jan Czajkowski, Faculty of Mathematics and Computer Science, Uniwersytet Wrocławski, Wrocław Stephan Rosebrock, Mathematik, Pädagogische Hochschule Karlsruhe, Karlsruhe Michal Ferov, Mathematics department, University of Southampton, Southampton Stefan Maubach, Mathematics, Jacobs University Bremen, Bremen Ilya Gekhtman, Department of Mathematics, University of Chicago, Chicago, Illinois Olga Kulikova, Fundamental Sciences, Mathematical Modelling, Bauman Moscow State University, Moscow Maria Milentyeva, Department of Mathematics, Moscow State Pedagogical University, Moscow Stacey Aston, School of Mathematics and Statistics, Newcastle University, Newcastle-upon-Tyne Kagan Dmitry, Department of Mathematics, Moscow State University of Railway Engineering, Moscow Svetla Vassileva, Mathematics and Statistics, McGill University, Montreal Dmitry Kagan, Department of Mathematics, Moscow State University of Railway Engineering, Moscow Timothy Riley, Mathematics, Cornell, Ithaca Alexander Olshanskii, Mathematics, Vanderbilt and Moscow State, Nashville SUHAS PANDIT, Mathematics, The abdus Salam International center for theoretical Physics, Trieste Alina Vdovina, Mathematics and Statistics, Newcastle University, Newcastle-upon-Tyne Khaled Bataineh, Department of Mathematics, University of Bahrain, Manama Sang-hyun Kim, Mathematical Sciences, KAIST, Daejeon Ioana Claudia Lazar, Deparment of Mathematics, Politehnica University of Timisoara, Timisoara Bakulin Sergey, Mathematical Sciences, Stevens Institute of Technology, Hoboken Bishnu Hari Subedi, Central Department of Mathematics, Tribhuvan University, Kathmandu Yago Antolin , Mathematics, Unicersity of Southampton, Southampton Paul-Henry Leemann, Section de Mathématiques, Université de Genève, Geneva Arye Juhasz, Mathematics, Technion, Israel Institute of Technology, Haifa Chloe Perin, IRMA, Université de Strasbourg, Strasbourg Andrew Duncan, Mathematics and Statistics, Newcastle, Newcastle upon Tyne Ashot Minasyan, Mathematics, University of Southampton, Southampton Cornelius Reinfeldt, Mathematisches Seminar, Christian-Albrechts-Universität zu Kiel, Kiel Atefeh Mohajeri Moghaddam, Mathematics and Statistics, McGill, Montreal Laura Ciobanu, Mathematics, University of Fribourg, Fribourg Richard Webb, Warwick Maths Institute, University of Warwick, Coventry Elena Aladova, Mathematics, The Hebrew University of Jerusalem, Jerusalem Delaram Kahrobaei, PhD Program in Computer Science (GC), Math Dept(NYCCT), CUNY Graduate Center and NYCCT, New York Agnieszka Bier, Faculty of Applied Mathematics, Silesian University of Technology, Gliwice Mladen Bestvina , Mathematics, University of Utah, Salt Lake City Pavel Morar, Department of Mathematical Sciences, Stevens Institute of Technology, Hoboken Colva Roney-Dougal, School of Mathematics and Statistics, University of St Andrews , St Andrews Johannes Cuno, Department of Mathematical Structure Theory, Graz University of Technology, Graz Alexei Miasnikov, Mathematics, Stevens Institute, Hoboken Alexey Talambutsa, Mathematical Logic, Steklov Mathematical Institute of RAS, Moscow Łukasz Garncarek, Mathematical Institute, Wrocław University, Wrocław Michał Marcinkowski, Instytut Matematyczny, Uniwersytet Wrocławski, Wrocław Enric Ventura, Matematica Aplicada III, Politecnica de Catalunya, Manresa Jordi Delgado, Matematica Aplicada III, UPC, Manresa Moritz Rodenhausen, Mathematical Institute, University of Bonn, Bonn Andreas Zastrow, Institute of Mathematics, University of Gdansk, Gdansk Albert Garreta Fontelles, Matemàtica Aplicada III, Universitat Politècnica de Catalunya, Barcelona John Mackay, Mathematical Institute, University of Oxford, Oxford Katy Beeler, Mathematics, Wake Forest University, Winston-Salem David Konietzko, Mathematisches Seminar, Christian-Albrechts-Universität zu Kiel, Kiel Robert Tang, Mathematics Institute, University of Warwick, Coventry Irina Dobrynina , Mathematics, Tula State Pedagogical University, Tula Wenyuan YANG, Mathematics, Université Paris-Sud 11, Paris Nikolai Vladimirovich Bezverkhnii, department of mathematical modelling, Moscow State Technical University, Tula Vladimir Bezverkhnii , Mathematics, Tula State Pedagogical University, Tula Andrey Nikolaev, Department of Mathematical Sciences, Stevens Institute of Technology , Hoboken Ekaterina Blagoveshchenskaya, Department of Mathematics , Petersburg State Transport University, St. Petersburg 190031 Alireza Ansari, Math., Shahrekord, Shahrekord Milad Ahanjideh, Pure Math., Amirkabir University of Technology (Tehran Polytechnic), Tehran Neda Ahanjideh, Pure Math., Shahrekord, Shahrekord Doron Puder, Mathematics, Hebrew U, Jerusalem Zoe O'Connor, Mathematics, Heriot-Watt University, Edinburgh Alan Logan, Mathematics, University of Glasgow, Glasgow Mahnaz Foroudi Ghasemabadi, Pure Mathematics, Tarbiat Modares University, Tehran Elena Klimenko, Mathematical Institute, University of Duesseldorf, Duesseldorf Eugene Plotkin, Mathematics, Bar Ilan, Ramat Gan Ali Iranmanesh, Mathematics, Tarbiat Modares University, Tehran Maurice Chiodo, Mathematics and Statistics, The University of Melbourne, Melbourne Mahdi Teymuri Garakani, Instituto de Matematica, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro Denis Serbin, Department of Mathematical Sciences, Stevens Institute of Technology, Hoboken Waldemar Holubowski, Institute of Mathematics, Silesian University of Technology, Gliwice Macdonald Jeremy, Mathematics and Statistics, Carleton University, Ottawa Kai-Uwe Bux, Fakultät für Mathematik, Universität Bielefeld, Bielefeld Kai Köhler, Mathematics, HHU Düsseldorf, Düsseldorf Gerhard Rosenberger, Mathematics, Hamburg, Hamburg Aglaia Myropolska, Mathematics department, University of Geneva, Geneva Mark Bell, Mathematics, The University of Warwick, Coventry Olga Kharlampovich, Math and Stats, Hunter College, CUNY, New York Igor Lysenok, Department of mathematical logic, Steklov Math Institute, Moscow ilya Kazachkov, Mathematical Institute, University of Oxford, Oxford Montserrat Casals-Ruiz, Mathematical Institute, University of Oxford, Oxford Robert Wisbauer, Mathematik, Heinrich Heine University, Duesseldorf Wilhelm Singhof, Mathematisches Institut, Heinrich-Heine-Universität , Düsseldorf Thomas Leßmann, Mathematisches Institut, Heinrich-Heine-Universität, Düsseldorf Dima Grigoriev, Mathematics, Lille, Villeneuve d'Ascq Riikka Kangaslampi, Department of Mathematics and Systems Analysis, Aalto University, Espoo Otto Kerner, Mathematisches Institut, Heinrich-Heine-Univ. Duesseldorf, Duesseldorf Francois DAHMANI, Institut Fourier, UJF, Grenoble I, Grenoble Gerald Williams, Mathematical Sciences, University of Essex, Colchester Andrey Nikolaev, Department of Mathematical Sciences, Stevens Institute of Technology, Hoboken Cameron Gordon, Mathematics, University of Texas at Austin, Austin Cynthia Hog-Angeloni, Dept. of Mathematics, University of Mainz, Mainz Vladimir Shpilrain, Department of Mathematics, The City College of New York, New York Stefan Schroeer, Mathematisches Institut, Heinrich-Heine-Universitaet Duesseldorf, Duesseldorf