This publication has been financed by the Faculty of Mathematics and Computer Scienc

Hejduk, Jacek

Kowalczyk, Stanisław

Pawlak, Ryszard J.

Turowska, Małgorzata

Repozytorium Uniwersytetu Łódzkiego (University of Lodz Repository)

Chapter 1PrefaceJACEK HEJDUK, STANISŁAW KOWALCZYK, RYSZARD J. PAWLAK,MAŁGORZATA TUROWSKAThe first conference on Real Functions Theory had been organized by Mathe-matical Institute of the Slovak Academy of Sciences in Bratislava since 1971.Since 1972 conferences were organized by other institutions every secondyear and since 2005 a Polish group of mathematicians joint to organize con-ferences every second year. So since 2004 International Summer Conferenceson Real Functions Theory held every year. The latter conference is XXIX, onein the series that consists of:(1) 1971 — Modra - Harmónia(2) 1972 — Cˇingov(3) 1974 — L’ubochnˇa(4) 1976 — Modra - Harmónia(5) 1978 — Modra - Harmónia(6) 1980 — Trnava(7) 1982 — Dolné Orešany(8) 1984 — Kamenný Mlyn(9) 1986 — Richnˇava(10) 1988 — Dubník(11) 1990 — Dubník(12) 1992 — Dubník(13) 1994 — Liptovský Ján(14) 1996 — Liptovský Jánhttp://dx.doi.org/10.18778/7969-663-5.018 Jacek Hejduk, Stanisław Kowalczyk, Ryszard J. Pawlak, Małgorzata Turowska(15) 1998 — Liptovský Ján(16) 2000 — Liptovský Ján(17) 2002 — Stará Lesná(18) 2004 — Stará LesnáFirst 18 conferences were organized by Slovak Academy of Sciences. Since2005 in odd years the International Summer Conferences on Real FunctionsTheory are organized by Pomeranian Academy in Słupsk, University of Łódz´,Łódz´ Technical University and University of Computer Sciences and Skills,and in even years the International Summer Conferences on Real FunctionsTheory are organized by Slovak Academy of Sciences.(19) 2005 — Rowy (Poland)(20) 2006 — Liptovský Ján (Slovakia)(21) 2007 — Niedzica (Poland)(22) 2008 — Stará Lesná (Slovakia)(23) 2009 — Niedzica (Poland)(24) 2010 — Liptovský Ján (Slovakia)(25) 2011 — Złoty Potok (Poland)(26) 2012 — Stará Lesná (Slovakia)(27) 2013 — Niedzica (Poland)(28) 2014 — Stará Lesná (Slovakia)(29) 2015 — Niedzica (Poland)Thus in 2015 we celebrate 10th anniversary since Pomeranian Academy inSłupsk, University of Łódz´ and Łódz´ University of Technology joined SlovakAcademy of Science and started organizing the International Summer Confer-ences on Real Functions Theory every odd year. As far, six conferences orga-nized by Polish institutions were held, four in Niedzica in Pieniny Mountains,one in Rowy near Baltic Sea and one in Złoty Potok in Central Poland.International Summer Conferences on Real Functions Theory has a widegroup of regular participants. Three of them, Professor Roman Ger, ProfessorJacek Je˛drzejewski and Professor Zygfryd Kominek, celebrate this year seven-tieth birthday anniversary.Professor Roman Ger was born at July 30, 1945. He received his master’sdegree in 1968 at a branch of Jagiellonian University in Katowice. In 1971 hereceived Ph. D. degree and habilitation in 1976, both from Silesian Universityin Katowice. He became a full professor in 1990. Professor Roman Ger startedresearch under the supervising of Professor Marek Kuczma, the founder ofPolish school of functional equations. From 1976 till now he works at SilesianUniversity. From 2005 to 2008 he was Deputy Director and from 2008 to 20121. Preface 9he was Director of the Mathematical Institute.Between 1990 and 1992 he was a Vice Chan-cellor of Silesian University. Simultaneously,he worked in Academy of Jan Długosz inCze˛stochowa in years 1981-1987, 1991-2010and in Silesian University of Technology inGliwice in 1988-1991. He was a visiting pro-fessor at the University of Waterloo, Waterloo,Ontario, Kanada, 1979; University of CentralFlorida, Orlando, Floryda, USA, 1987-88;Karl-Franzens-Universität, Graz, Austria, 1994;Universitaät Bern, Berno, Szwajcaria, 1995.In years 1984-2000 he led, founded by Professor Marek Kuczma, the seminaron Functional Equations. In 1981 he founded and leads till now the seminar onFunctional Equations and Inequalities.His scientific output contains more than 110 scientific papers, mainly de-voted to functional equations and inequalities. He gave more than 50 lec-tures among the other Universities in USA, Canada, Germany, Italy, Austria,Switzerland, Spain, Greece, Hungary, Czech Republic, Denmark, Israel, ChinaRepublic and Venezuela. He was a supervisor of 15 Ph.D. students and hasserved as a referee for 26 Ph.D. thesis, 8 habilitation dissertations and 18 ap-plications for professor nomination.Professor Jacek Je˛drzejewski was born at August 6, 1945. He received hismaster’s degree in 1969, Ph. D. degree in 1974 and habilitation degree in 1984,all of them from University of Łódz´. He workedat the University of Łódz´ in years 1969-1984.He was a Senior Lecturer in Rivers StateUniversity of Science and Technology, PortHarcourt, Nigeria, 1984-1988. After his returnto Poland he worked at Higher PedagogicalSchool in Bydgoszcz, Pomeranian Academy inSłupsk 1989-2005, University of Computer Sci-ences and Skills 1999-2011 and Academy of JanDługosz in Cze˛stochowa 2005-2015. From 1988 to 1993 he was a Deputy Di-rector and from 1993 to 1995 he was the Director of the Mathematical Instituteat Higher Pedagogical School in Bydgoszcz. From 1989 to 1990 he was a ViceDean and from 1990 to 1993 he was a Vice Chancellor at Higher PedagogicalSchool in Bydgoszcz. He also was the Director of the Mathematical Instituteat Pomeranian Academy in Słupsk 1999-2005.10 Jacek Hejduk, Stanisław Kowalczyk, Ryszard J. Pawlak, Małgorzata TurowskaHis scientific output contains more than 40 papers, mainly devoted to func-tion theory and topology. He was the supervisor of 3 Ph.D. students and hasserved as a referee for 4 Ph.D. thesis.In 1997 Professor Jacek Je˛drzejewski organized the first International Con-ference on Real Functions Theory in Ustka. Next conferences took place in2001 in Łeba and in 2003 in Rowy. In 2005 these conferences evolved intoInternational Summer Conferences on Real Functions Theory. Professor Je˛-drzejewski was the president of all International Summer Conferences on RealFunctions Theory organized by Polish Universities.Professor Zygfryd Kominek was born at November 8, 1945. He received hismaster’s degree in 1968 at a branch of Jagiellonian University in Katowice.In 1974 he received Ph. D. degree from SilesianUniversity in Katowice and in 1991 he receivedhabilitation degree from Warsaw Universityof Technology. He became a full professor in2008. From 1976 till now he works at SilesianUniversity. From 1992 to 1996 and from 2011till now he was a Deputy Director and from1996 to 2002 he was the Director of Mathe-matical Institute. Simultaneously, he workedin Academy of Jan Długosz in Cze˛stochowa1992-1998, 2004-2006, in Łódz´ University ofTechnology branch in Bielsko-Biała 1991-2001,in The University of Bielsko-Biała 2001-2003 and in the Katowice Institute ofInformation Technologies 2006-2011.His scientific output contains more than 70 papers, mainly devoted to condi-tional functional equations, convex functions and systems of functional equa-tions. He was the supervisor of 5 Ph.D. students and has served as a referee for16 Ph.D. thesis.The presented monograph Modern Real Analysis is dedicated to the men-tioned anniversaries. It contains several chapters, written by frequent partici-pants of International Summer Conferences on Real Functions Theory, wheretheir actual research topics are presented.

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