About the Editor and Contributors Kiril Bankov, Bulgaria, a Ph.D. in mathematics, prepares future mathe- matics teachers as a Professor of Mathematics Education at the University of Sofia and the Bulgarian Academy of Sciences. He has been involved in mathematics competitions in Bulgaria for more than 20 years as an author of contest problems and as a member of juries. He has written many articles, made presentations, and is a co-author of books on mathematics competi- tions, problem solving, work with mathematically gifted students, etc. Two of his papers in “Mathematical Gazette” won “Article of the Year” citation (1995 and 1999). Bankov has an extensive experience in international large-scale studies in mathematics education. For more than a decade he has been a member of the International Expert Committee (SMIRC) for TIMSS study. He also worked as a mathematics coordinator for the International Study Center of the Teacher Education and Development Study—Mathe- matics (TEDS-M) at Michigan State University (USA). In 2014 he was the Chairperson of the European Baccalaureate Examining Board. Bankov was the Secretary of World Federation of National Mathematics Competitions (WFNMC) 2008–2012, and serves presently as the Senior Vice President. Francisco Bellot–Rosado, Spain, served as Chair of the Mathematics Department of High Schools “Marqués de la Ensenada”, Logroño (1966–70) and “Emilio Ferrari”, Valladolid (1970–2006), and Associate Professor on the Faculty of Sciences of the University of Valladolid (several times during 1971–1999). He was Team Leader or Deputy Leader of the Spanish Team in the International Mathematical Olympiad (IMO) and Iberoamerican Math Olympiad (OIM), 1988–1997, Europe Representative in WFNMC 1996– present; and Member of the Joint Committee of Governors of the RSME in various periods 1997–present. He served as the Editor of the Journal SIPROMA (1996–98), published by the Organization of Iberoamerican States (OEI). He founded the Mediterranean Mathematics Competition (Peter O’Halloran Memorial) in 1998; and starting in 1984 organized in Spain the Mathematical Kangaroo Contest. In 2000, Bellot-Rosado was presented the © Springer International Publishing AG 2017 373 A. Soifer (ed.), Competitions for Young Mathematicians, ICME-13 Monographs, DOI 10.1007/978-3-319-56585-9 374 About the Editor and Contributors Paul Erdős Award by the WFNMC. Starting in 2002, he served as the Editor of the digital journal Revista Escolar de la OIM. H served as the Leader of the Spanish team at the 5th European Girls Mathematics Olympiad (Busteni, Romania, 2016). Luis F. Cáceres-Duque, Puerto Rico, a Ph.D. in Logic from The University of Iowa, is a Professor at the University of Puerto Rico, Maya- guez Campus. He is well recognized in the educational system of Puerto Rico, and has worked for the last fifteen years in several educational projects including professional development of mathematics and science teachers. Cáceres is well-known in the field of international mathematical competi- tions. He is the Secretary of the Association Kangaurou Sans Frontieres. He is also the Founder and Director of The Mathematical Olympiad Program in Puerto Rico. In 2016, Cáceres was presented the Paul Erdős Award by the World Federation for National Mathematical Competitions. He has several papers and books in Logic, Ring theory, math Olympiads and secondary school mathematics. In 2014, he published a joint paper “So Much Hap- pening, So Much to Do,” Notices of the AMS. He recently published the book “Math Olympiads in Puerto Rico: 2015–2016.” Cáceres collaborates with the organization of math Olympiads in different countries and he is invited frequently to different countries to offer courses and conferences. His interests include geometry, math Olympiads problems, math talented stu- dents and professional development of math teachers. Sergey Dorichenko, Russia, a 1995 M.A. in Mathematics from Moscow State University (MGU), has taught in the Mathematical Circles program of MGU. As a result, he published the book “A Moscow Math Circle: Week-by-Week Problem Sets,” Math Circles Library, MSRI, AMS, 2012. Multiple times he was Deputy Chair of the Organizing Committee and Head Judge of the Moscow Mathematical Olympiad; for several years he worked as a judge and a member of the Organizing Committee of the Lomonosov Tournament. Dorichenko served as a Teacher of Mathematics in Moscow schools 57 (1992–2011) and 179 (2002–present). Deputy Director of the mathematical section of Moscow school №179 (from 2007). Works at the Center of Pedagogical Mastery in Moscow. He also served as the Chair of the Central Jury and Problems Committee of the International Mathematics Tournament of Towns; and the Chair of the Jury of the Summer Conference of the Tournament of Towns. He is the Head of the Department of Mathematics a member of the Editorial Board of the magazine “Kvant” (2008–2016). In 2012 he founded the magazine «Kvantik» and has since served as its Editor-in-Chief. Dorichenko is pre- sently the Secretary of the World Federation of National Mathematical About the Editor and Contributors 375 Competitions. He authored several books and multiple articles, published in magazines «Kvant», «Kvantik», «Mathematical Enlightenment», and «Mathematical Education». Mary Falk de Losada (María), Colombia, is a Professor at the Univer- sidad Antonio Nariño in Bogotá. She did her graduate work in mathematics and math education at Harvard University and the University of Illinois at Chicago. She is cofounder with Ricardo Losada and Rafael Mariño of the Colombian Mathematics Olympiads, the Iberoamericans Mathematics Olympiad, and with many others of the World Federation of Mathematics Competitions (WFNMC). She has received the David Hilbert Award from WFNMC and the José Celestino Mutis Prize from the Colombian Mathe- matics Society for her work in mathematics Olympiads in Colombia and Latin America. She was elected member at large of the ICMI Executive Committee and has worked in various capacities on the organization of ICMEs since 1996, as well as currently being a member of the International Mathematics Union Circle. In 2003, she served as the President of the International Jury of International Mathematical Olympiad in Colombia. María served as the President of WFNMC, and at this time is the Immediate Past President, serving on the Executive Committee and chairing the WFNMC awards committee that determines the recipients of the Paul Erdős Award. She has published several books in Colombia for future math teachers as well as many of the yearly collections of problems from the Colombian Math Olympiads. Retired as professor of the National University of Colombia, she continues to divide her time between the Colombian Math Olympiads and a doctoral program in mathematics education at the Universidad Antonio Nariño in Bogotá. Married for over fifty years to Ricardo Losada, they have five children—all in fields related to mathematics —and nine grandchildren. Robert Geretschläger, Austria Robert (full name: OStR Prof. Mag.rer.nat. Dr.phil. Robert Rudolf Alfred Geretschläger; quite a mouthful) has been active as a mathematics teacher, author and competitions coordinator for over 35 years. Along with his full-time teaching duties at Bundesrealgym- nasium Keplerstrasse in Graz, Austria, and his work at the Karl-Franzens University in Graz, he has also worked on curriculum development in Austria and co-authored a series of high school mathematics textbooks. He is the author of “Geometric Origami” and co-author of such books as “The Circle” along with numerous compilations of competition problems. His main interests lie in the preparation and organization of mathematics com- petitions. He has been responsible for the introduction and organization of several competitions in Austria, such as the Mathematical Kangaroo, the 376 About the Editor and Contributors International Tournament of the Towns, and the Mediterranean Mathematics Competition, and has been actively involved in the Austrian Mathematical Olympiad for over 30 years. Since the year 2000. He has represented Austria at the International Mathematical Olympiad, first as Deputy Leader of the Austrian team, and starting in 2006 as a member of the problem selection committee, and the Austrian Team Leader. He is also a member of the international boards of the Kangourou sans Frontières (KSF) and pre- sently a Vice President of the World Federation of National Mathematics Competitions (WFNMC). Matúš Harminc, Slovakia, a 1986 Ph.D. in Group Theory and Algebra, is an Associate Professor at the Institute of Mathematics, Faculty of Science, Pavol Jozef Šafárik University, Košice. After graduation, he worked at the Mathematical Institute of the Slovak Academy of Sciences. From 1975 to 1986 he taught on several Slovak faculties. He gives courses on Number Theory, Mathematical Methods of Problem Solving, and the Introduction to Mathematics for pre-service teachers. His main research areas are teaching methods and the solving of math word problems. Martina Jesenská, Slovakia, works at the Giles Academy, Boston, Lin- colnshire, England. In 2015, she graduated from Pavol Jozef Šafárik University in Košice with the master's degree in Teaching Mathematics. She is presently on her second year of teaching Mathematics. Romualdas Kašuba, Lithuania, is Ph.D. from the University of Greif- swald, Germany, teaches Mathematics, Communications Skills, and Ethics at Vilnius University. He has a long history with various Mathematical Olympiads (MO): being a jury member of the Lithuanian MO since 1979, the Deputy Leader of the Lithuanian IMO team since 1996, and the leader of the Lithuanian team at the Baltic Way team-contest since 1995. In 1999, he initiated the Lithuanian Mathematical Olympiad for youngsters and has been involved in Lithuanian Kangaroo movement from the same year, as well as being the leader of the Lithuanian MEMO team since 2009. Besides being the author of several books in Lithuanian, he has composed several booklets in English (“What to do when you do not know what to do,” Parts I and II, as well as “Once upon a time I saw the puzzle,” Parts I, II, and III).