Positivity of solutions to inhomogeneous mixed-type equations of higher orders
К. Б. СабитовInstitute of Applied Research of Bashkortostan Republic, ul. Odesskaya 68, Sterlitamak, 453103, Russia
2016en
ABI
Abstract
We study the solution to inhomogeneous mixed-type elliptic-hyperbolic equations of higher orders. We prove that the solution sign is constant and depends on the sign of the right-hand side of the equation.
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Cited by 20 references