Jozef SpalekJózef Spałek is currently professor of theoretical physics in the Marian Smoluchowski Institute of Physics, Jagiellonian University in Kraków (Poland). He is interested in theory of strongly correlated systems and, in particular, in high-temperature uperconductivity and phase transitions in fermionic systems. In 2016 he received the two highest scientific prizes in Poland: The Foundation for Polish Science Award and The Prime Minister Prize, for his work on strongly correlated systems, and in particular,for the original derivation of the t-J model. At present, he is working on another book, Introduction to Condensed Matter Physics, with selected topics in strongly correlated systems, to be published by Springer-Verlag (2018). Read More Read Less