- Maximal regularity of Stokes problem with dynamic boundary condition -- Hilbert setting For the evolutionary Stokes problem with dynamic boundary condition we show maximal regularity of weak solutions in time. Due to the characteriation of R-sectorial operators on Hilbert spaces, the proof reduces to finding the correct functional analytic setting and proving that an operator is sectorial, i.e. generates an analytic semigroup. 3 authors · Aug 3, 2023