Fredholm solvability of a periodic Neumann problem for a linear telegraph equation

  • I. Ya. Kmit


We investigate a periodic problem for the linear telegraph equation $$u_{tt} - u_{xx} + 2\mu u_t = f (x, t)$$ with Neumann boundary conditions. We prove that the operator of the problem is modeled by a Fredholm operator of index zero in the scale of Sobolev spaces of periodic functions. This result is stable under small perturbations of the equation where p becomes variable and discontinuous or an additional zero-order term appears. We also show that the solutions of this problem possess smoothing properties.
How to Cite
KmitI. Y. “Fredholm Solvability of a Periodic Neumann Problem for a Linear Telegraph Equation”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 65, no. 3, Mar. 2013, pp. 381-9,
Research articles