On May 21-24, 2018, the international conference “Operators, Functions, and Systems of Mathematical Physics” was held on organizational support of the Department of Mathematics of Khazar University and under supervision of International Organization Committee consisting of delegates from Azerbaijan, Russia, Georgia, Turkey, Ukraine, the United States, Sweden and the United Arab Emirates. Participants of the international conference – Varga Kalantarov (Turkey), Yaudat Sultanaev (Russia), Andrey Shafarevic (Russia), Aleksandr Helenski (Russia), Aleksey Kosetenko (Austria), Boris Mityagin (USA), Nikolai Marchuk (Russia), Galina Zagrebnova (France), Tawkhelide Kordialli (Georgia), Grigori Rozenblioum (Sweden), Roman Bessonov (Russia), V.V.Peller (USA), Mark Malamud (Ukraine), A.L.Skubachevsky (Russia), Roland Duduchava (Georgia), Alexander Belavin (Russia), Mikhail Sheffield (Russia) have sent letters of gratitude to organization committee and Khazar University for high-level organization of the conference.