Institution: | 1. Department of Mathematics and its Applications, Central European University, Nador u. 9, 1051, Budapest, Hungary 2. Department of Mathematics and Computer Science, University Politehnica of Bucharest, 313 Splaiul Independen?ei, 060042, Bucharest, Romania 3. Research Group of the Project PN-II-ID-PCE-2012-4-0021, “Simion Stoilow” Institute of Mathematics of the Romanian Academy, 21 Calea Grivi?ei, Bucharest, Romania 4. Department of Applied Analysis, ELTE, Pázmány P. sétány 1/C, 1117, Budapest, Hungary 5. Faculty of Mathematics and Computer Science, Babe?-Bolyai University, Kog?lniceanu str. 1, 400084, Cluj-Napoca, Romania
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