At the Institute seminar devoted to 70 years of ANAS, professor of Koch University Varga Kalantarov gave a talk on “Decomposing solutions of nonlinear wave equations at limited and finite time. In the talk, the existence of solutions with arbitrary great initial energy of initial boundary value problems for nonlinear Klein-Gordon equation, Kirchhoff equation, nonlinear power dissipative wave equation and appropriate systems is proved. Regular boundedness in time of indecomposable solutions of initial boundary value problems for a wider class of nonlinear wave equations is proved.

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