The defense of the PhD dissertation by Azamatov Azizbek Shavkatovich on the topic “Integration of the Kaup–Boussinesq and discrete sine-Gordon equation systems with a compatible source in the class of rapidly decreasing functions”, specialty 01.01.02 – “Differential Equations and Mathematical Physics”, for the degree of Doctor of Philosophy (PhD) in Physical and Mathematical Sciences, was held on August 23, 2023, at 14:00, at the meeting of the Scientific Council No. PhD.03/30.12.2019.FM.55.01 under Urgench State University