Determining a nonlinear hyperbolic system with unknown sources and nonlinearity
Yi‐Hsuan Lin, Hongyu Liu, Xu Liu
Abstract
Abstract This paper is devoted to some inverse boundary problems associated with a time‐dependent semilinear hyperbolic equation, where both nonlinearity and sources (including initial displacement and initial velocity) are unknown. It is shown in several generic scenarios that one can uniquely determine the nonlinearity and/or the sources by using passive or active boundary observations. In order to exploit the nonlinearity and the sources simultaneously, we develop a new technique, which combines the observability for linear wave equations and an approximation property with higher order linearization for the semilinear hyperbolic equation.
Topics & Concepts
Nonlinear systemMathematicsApplied mathematicsMathematical analysisPhysicsQuantum mechanicsNumerical methods in inverse problemsStability and Controllability of Differential EquationsDifferential Equations and Boundary Problems