Wiadomosci lekarskie (Warsaw, Poland : 1960).
NLM (Medline).
Vol. 74.
2021.
P. 3226-3229
We study boundary value problems for the wave equation with conditions on the entire boundary and obtain sufficient conditions for the Fredholm solvability of the problem in suitable function spaces. It turns out that these conditions depend on the properties of the geodesic flow. © 2021, Springer Nature Switzerland AG.