Institution: | 1. Faculty of Technology, Narvik University College, Postboks 385, 8505 Narvik, Norway.;2. Computer Centre, P.N. Lebedev Physical Institute of RAS, 53, Leninski pr., Moscow, 119991, Russia.;3. Department of Mathematics, Simon Kuznets Kharkiv National University of Economics, 9a Lenin ave., Kharkiv, 61166, Ukraine.;4. Mathematical Department, B.Verkin Institute for Low Temperature Physics and Engineering of the NASU, 47 Lenin ave., Kharkiv, 61103, Ukraine. |