Exact controllability for degenerate and singular wave equations

In this article, we study exact controllability for degenerate and singular wave equations with a general coefficient. We estimate the observability inequality by the multiplier method and determine the observability time. We also deduce the exact controllability of the corresponding degenerate and singular control problem at a sufficiently large time, employing the Hilbert uniqueness method. For more information see https://ejde.math.txstate.edu/Volumes/2025/04/abstr.html