BOUNDARY-VALUE PROBLEM FOR A MIXED PARABOLO-HYPERBOLIC EQUATION OF THE FOURTH ORDER WITH A STRING OPERATOR

2021 ◽  
Vol 3 (1) ◽  
pp. 10-18
Author(s):  
Kubatbek Abdumitalip uulu
2008 ◽  
Vol 15 (3) ◽  
pp. 555-569
Author(s):  
Tariel Kiguradze

Abstract In the rectangle Ω = [0, a] × [0, b] the nonlinear hyperbolic equation 𝑢(2,2) = 𝑓(𝑥, 𝑦, 𝑢) with the continuous right-hand side 𝑓 : Ω × ℝ → ℝ is considered. Unimprovable in a sense sufficient conditions of solvability of Dirichlet, Dirichlet–Nicoletti and Nicoletti boundary value problems are established.


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