Special Issue on Ciric type fixed point theorems

Professor Ljubomir Ćirić was born on August 13, 1935 in Resnik, environmentof the Niš, in Serbia. Primary,secondary and university education Professor Ćirić received in Belgrade, where he completed his Mr Sci and his Dr Sci in 1969. His fields of specialization are Fixed point theory and Nonlinear analysis. He has been founder of different directions in the theory of fixed points, which and in today's time are in the full development. During the past 45 years, he has given significant contributions to these areas. We want point out that his works have been published and cited in prestigious international journals. Two of his work has been cited in the Web of Science over 560 times, each over 250 times. Name Ćirić we can find in the titles over 130 of scientific works of mathematicians from various countries of world. Many mathematical notions and objects are attributed to (and named after) him. These notions and objects include (among other items) "Ćirić’s generalized contractions", “Ljubomir Ćirić quasi-contraction mappings ", "Ćirić's contraction operator", "Ćirić’s multi-valued generalized contractions", “Multivalued Ćirić type mappings”,“Ćirić's maps with a nonunique fixed point”, “Ćirić type non-unique fixed point theorems”, “Ćirić type probabilistic fixed point theorems”, “Ćirić type nonexpansive mappings”, “Ćirić-type almost contractions”, “Nonlinear quasi-contractions of Ćirić-type”, “Ćirić-type δ-contractions”, “Ćirić Quasi Contractive Operator“, “Ćirić typeweak contractions”, “Ćirić-type strong almost contractions”, “Ćirić type cyclic contraction”, “Ćirić-G-Contractions”, “T–Ćirić generalized contractions”, “α-ψ-Ćirić generalized multifunctions”, “Ćirić type I-contractions”, “Prešić - Ćirić type theorems”, “Set-valued Prešić-Ćirić type contractions”,“Ćirić-Suzuki-type inequality”, “Ćirić-Reich-Rus operators”, “Ćirić-Jachymski-Matkowski contraction”, et cetera. All the above words are titles or a part of titles of 130 scientific works. Ćirić is currently Editor-in-Chief of an international journal “Advances in fixed point Theory”, United Kingdom, and a Section editor or a member of the editorial board of many well-known journals in the field of fixed point theory and nonlinear analysis. Fixed point theory is a very powerful and important tool in the study of nonlinear phenomena. The aim of this special issue is to promote contributions in various directions of this theory. Quality research articles, including.